diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc., <http://fsf.org/>
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
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+
+  Finally, any free program is threatened constantly by software
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+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
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+
+Thus, it is not the intent of this section to claim rights or contest
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+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
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+    years, to give any third party, for a charge no more than your
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+
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+    allowed only for noncommercial distribution and only if you
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+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
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+distribution of the source code, even though third parties are not
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+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    {description}
+    Copyright (C) {year}  {fullname}
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  {signature of Ty Coon}, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/Setup.hs b/Setup.hs
new file mode 100644
--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/app/FeatureTableEditor.hs b/app/FeatureTableEditor.hs
new file mode 100644
--- /dev/null
+++ b/app/FeatureTableEditor.hs
@@ -0,0 +1,264 @@
+{-# LANGUAGE LambdaCase, OverloadedStrings, ExtendedDefaultRules #-}
+
+module FeatureTableEditor (
+    createEditableFT,
+    displayFeatureMatrix,
+    displayDynFeatureTable
+) where
+
+import Graphics.UI.Gtk
+import Control.FRPNow hiding (swap)
+import Control.FRPNow.GTK
+import Control.FRPNow.GTK.MissingFFI
+import Control.Monad
+import Control.Exception
+import Data.Tuple
+import Text.PhonotacticLearner.PhonotacticConstraints
+import qualified Data.Text as T
+import qualified Data.Text.Encoding as T
+import Data.Array.IArray
+import qualified Data.Map.Lazy as M
+import qualified Data.ByteString as B
+import Control.DeepSeq
+
+default (T.Text)
+
+
+data FTRow = FTRow T.Text (M.Map SegRef FeatureState) deriving (Eq, Show)
+
+fsTrue FPlus = True
+fsTrue FMinus = False
+fsTrue FOff = False
+
+fsInc FPlus = False
+fsInc FMinus = True
+fsInc FOff = False
+
+fsCycle FPlus = FMinus
+fsCycle FMinus = FOff
+fsCycle FOff = FPlus
+
+ft2rows ft = ffor (assocs . featNames $ ft) $ \(fi,fn) -> let
+    sbounds = bounds (segNames ft)
+    sidxs = indices (segNames ft)
+    fsmap = M.fromList [(i,ftlook ft i fi) | i <- sidxs]
+    in FTRow fn fsmap
+
+rows2ft :: Array SegRef String -> [FTRow] -> FeatureTable String
+rows2ft segs rows = FeatureTable ftarr fnames segs flook slook where
+    nf = length rows
+    (sa,sb) = bounds segs
+    nrows = zip [1..] rows
+    fnames = array (1,nf) [(n,fn) | (n,FTRow fn _) <- nrows]
+    ftarr = array ((sa,1),(sb,nf)) $ do
+        (fi, FTRow _ fsmap) <- nrows
+        (si,fs) <- M.assocs fsmap
+        return ((si,fi),fs)
+    slook = M.fromList (fmap swap (assocs segs))
+    flook = M.fromList (fmap swap (assocs fnames))
+
+
+setFTContents :: TreeView -> FeatureTable String -> IO (Array SegRef String, ListStore FTRow)
+setFTContents editor newft = do
+    let segs = segNames newft
+        rows = ft2rows newft
+    model <- listStoreNew rows
+    oldcols <- treeViewGetColumns editor
+    forM_ oldcols $ \col -> treeViewRemoveColumn editor col
+    treeViewSetModel editor model
+
+    lcol <- treeViewColumnNew
+    set lcol [treeViewColumnTitle := "Feature"]
+    lcell <- cellRendererTextNew
+    set lcell [cellTextEditable := True]
+    cellLayoutPackStart lcol lcell True
+    treeViewAppendColumn editor lcol
+    cellLayoutSetAttributes lcol lcell model $ \(FTRow fn _) ->
+        [cellText := fn]
+    on lcell edited $ \[i] newtext -> do
+        FTRow _ fsmap <- listStoreGetValue model i
+        listStoreSetValue model i (FTRow newtext fsmap)
+
+    forM_ (assocs segs) $ \(si,sn) -> do
+        col <- treeViewColumnNew
+        set col [treeViewColumnTitle := sn]
+        cell <- cellRendererToggleNew
+        cellLayoutPackStart col cell True
+        treeViewAppendColumn editor col
+        cellLayoutSetAttributes col cell model $ \(FTRow _ fsmap) ->
+            [cellToggleActive := fsTrue (fsmap M.! si),
+            cellToggleInconsistent := fsInc (fsmap M.! si)]
+        on cell cellToggled $ \tpStr -> do
+            let [i] = stringToTreePath tpStr
+            FTRow fn fsmap <- listStoreGetValue model i
+            let newrow = FTRow fn (M.adjust fsCycle si fsmap)
+            listStoreSetValue model i newrow
+    pcol <- treeViewColumnNew
+    treeViewAppendColumn editor pcol
+    return (segs, model)
+
+
+watchFtModel :: (Array SegRef String, ListStore FTRow) -> Now (Behavior (FeatureTable String))
+watchFtModel (segs, model) = do
+    (rowsChanged, rowcb) <- callbackStream
+    let changecb = listStoreToList model >>= rowcb
+    sync $ do
+        on model rowChanged $ \_ _ -> changecb
+        on model rowInserted $ \_ _ -> changecb
+        on model rowDeleted $ \_ -> changecb
+    initrows <- sync $ listStoreToList model
+    dynrows <- sample $ fromChanges initrows rowsChanged
+    return $ fmap (rows2ft segs) dynrows
+
+loadFTfromFile :: FilePath -> IO (Maybe (FeatureTable String))
+loadFTfromFile fp = fmap join . checkIOError $ do
+    bincsv <- B.readFile fp
+    evaluate $ force . csvToFeatureTable id . T.unpack =<< either (const Nothing) Just (T.decodeUtf8' bincsv)
+
+createEditableFT :: Maybe Window -> FeatureTable String -> Now (VBox, Behavior (FeatureTable String))
+createEditableFT transwin initft = do
+    editor <- sync treeViewNew
+    editor' <- createScrolledWindow editor
+    sync $ set editor' [scrolledWindowOverlay := False]
+
+    (loadButton, loadPressed) <- createButton (Just "document-open") (Just "Load Table")
+    (saveButton, savePressed) <- createButton (Just "document-save") (Just "Save Table")
+    (addButton, addPressed) <- createButton (Just "list-add") Nothing
+    (delButton, delPressed) <- createButton (Just "list-remove") Nothing
+    (editButton, isEditing) <- createToggleButton (Just "accessories-text-editor") (Just "Edit Table") False
+    setAttr widgetSensitive addButton isEditing
+    setAttr widgetSensitive delButton isEditing
+
+    (ftReplaced, replaceft) <- callbackStream
+    (modelReplaced, replaceModel) <- callbackStream
+    initmodel <- sync $ setFTContents editor initft
+    currentModel <- sample $ fromChanges initmodel modelReplaced
+
+    initdft <- watchFtModel initmodel
+    callStream (sync . replaceft <=< watchFtModel . last) modelReplaced
+    currentft <- sample$ foldrSwitch initdft ftReplaced
+
+    viewer <- displayDynFeatureTable currentft
+
+    bar <- createHBox 2 $ do
+        bpack addButton
+        bpack delButton
+        bspacer
+        bpack editButton
+        bpack loadButton
+        bpack saveButton
+
+
+    top <- sync stackNew
+    sync $ do
+        stackAddNamed top viewer "False"
+        stackAddNamed top editor' "True"
+    setAttr stackVisibleChildName top (fmap show isEditing)
+
+    vb <- createVBox 2 $ do
+        bstretch =<< createFrame ShadowIn top
+        bpack bar
+
+    csvfilter <- sync fileFilterNew
+    allfilter <- sync fileFilterNew
+    sync $ do
+        fileFilterAddMimeType csvfilter "text/csv"
+        fileFilterSetName csvfilter "CSV"
+        fileFilterAddPattern allfilter "*"
+        fileFilterSetName allfilter "All Files"
+
+    loadDialog <- sync $ fileChooserDialogNew (Just "Open Feature Table") transwin FileChooserActionOpen
+        [("gtk-cancel", ResponseCancel), ("gtk-open", ResponseAccept)]
+    sync $ fileChooserAddFilter loadDialog csvfilter
+    sync $ fileChooserAddFilter loadDialog allfilter
+    flip callStream loadPressed $ \_ -> do
+        filePicked <- runFileChooserDialog loadDialog
+        emft <- planNow . ffor filePicked $ \case
+            Nothing -> return never
+            Just fn -> async $ loadFTfromFile fn
+        planNow . ffor (join emft) $ \case
+            Nothing -> sync $ putStrLn "Invalid CSV table."
+            Just newft -> sync $ do
+                newmodel <- setFTContents editor newft
+                replaceModel newmodel
+                putStrLn "Feature table sucessfully loaded."
+        return ()
+
+    saveDialog <- sync $ fileChooserDialogNew (Just "Save Feature Table") transwin FileChooserActionSave
+        [("gtk-cancel", ResponseCancel), ("gtk-save", ResponseAccept)]
+    sync $ fileChooserAddFilter saveDialog csvfilter
+    sync $ fileChooserAddFilter saveDialog allfilter
+    flip callStream savePressed $ \_  -> do
+        savePicked <- runFileChooserDialog saveDialog
+        planNow . ffor savePicked $ \case
+            Nothing -> return ()
+            Just fn -> do
+                ft <- sample currentft
+                async $ do
+                    let csv = featureTableToCsv id ft
+                        bincsv = T.encodeUtf8 (T.pack csv)
+                    B.writeFile fn bincsv
+                    putStrLn $ "Wrote Feature Table " ++ fn
+                return ()
+        return ()
+
+    flip callStream addPressed $ \_ -> do
+        (segs, store) <- sample currentModel
+        let newRow = FTRow "" (M.fromList [(s,FOff) | s <- indices segs])
+        sync $ listStoreAppend store newRow
+        return ()
+    flip callStream delPressed $ \_ -> do
+        (segs, store) <- sample currentModel
+        (cur, _) <- sync $ treeViewGetCursor editor
+        sync $ case cur of
+            [i] -> listStoreRemove store i
+            _ -> return ()
+
+    return (vb, currentft)
+
+displayFeatureMatrix :: FeatureTable String -> IO Grid
+displayFeatureMatrix ft = do
+    g <- gridNew
+    set g [widgetName := Just "featuretable"]
+    --set g [ containerBorderWidth := 5 ]
+    --gridSetColumnSpacing g 2
+    forM_ (assocs (segNames ft)) $ \(Seg n,s) -> do
+        l <- labelNew (Just s)
+        let oddclass = if odd n then ["oddcol"] else []
+        widgetAddClasses (["segheader"] ++ oddclass) l
+        gridAttach g l n 0 1 1
+    forM_ (assocs (featNames ft)) $ \(n,f) -> do
+        l <- labelNew (Just f)
+        widgetAddClasses ["featheader"] l
+        set l [miscXalign := 0]
+        gridAttach g l 0 n 1 1
+    forM_ (assocs (featTable ft)) $ \((Seg s, f), fs) -> do
+        l <- case fs of
+            FPlus -> labelNew (Just "+")
+            FMinus -> labelNew (Just "−")
+            FOff -> do
+                l <- labelNew (Just "0")
+                widgetAddClasses ["featzero"] l
+                return l
+        let oddclass = if odd s then ["oddcol"] else []
+        widgetAddClasses oddclass l
+        gridAttach g l s f 1 1
+    return g
+
+displayDynFeatureTable :: Behavior (FeatureTable String) -> Now ScrolledWindow
+displayDynFeatureTable dynft = do
+    initft <- sample dynft
+    scr <- sync $ scrolledWindowNew Nothing Nothing
+    done <- getUnrealize scr
+    let ftchanged = toChanges dynft `beforeEs` done
+    initwidget <- sync $ displayFeatureMatrix initft
+    sync $ scrolledWindowAddWithViewport scr initwidget
+    Just vp' <- sync $ binGetChild scr
+    let vp = castToViewport vp'
+    flip callIOStream ftchanged $ \newft -> do
+        Just oldw <- binGetChild vp
+        widgetDestroy oldw
+        newwidget <- displayFeatureMatrix newft
+        containerAdd vp newwidget
+        widgetShowAll newwidget
+    return scr
diff --git a/app/GrammarEditor.hs b/app/GrammarEditor.hs
new file mode 100644
--- /dev/null
+++ b/app/GrammarEditor.hs
@@ -0,0 +1,157 @@
+{-# LANGUAGE LambdaCase, OverloadedStrings, ExtendedDefaultRules, TupleSections, ScopedTypeVariables #-}
+
+module GrammarEditor where
+
+import Graphics.UI.Gtk
+import Control.FRPNow hiding (swap, when)
+import Control.FRPNow.GTK
+import Control.Monad
+import Control.Monad.IO.Class
+import Control.Exception
+import Data.Foldable
+import Data.Maybe
+import Text.PhonotacticLearner.PhonotacticConstraints
+import Text.PhonotacticLearner.PhonotacticConstraints.FileFormats
+import Text.PhonotacticLearner.MaxentGrammar
+import Text.PhonotacticLearner.Util.Ring
+import qualified Data.Text as T
+import qualified Data.Text.Encoding as T
+import qualified Data.Text.Encoding.Error as T
+import qualified Data.Map.Lazy as M
+import qualified Data.ByteString as B
+import qualified Data.Set as S
+import Data.Array.IArray
+import Control.DeepSeq
+import Text.Read (readMaybe)
+import Data.IORef
+import Numeric
+
+import qualified Graphics.Rendering.Cairo as C
+import Graphics.Rendering.Chart.Easy hiding (indices, set')
+import Graphics.Rendering.Chart.Renderable
+import Graphics.Rendering.Chart.Geometry
+import Graphics.Rendering.Chart.Drawing
+import Graphics.Rendering.Chart.Backend.Cairo
+import Graphics.Rendering.Chart.State(EC, execEC)
+
+default (T.Text)
+
+createChartWidget :: (Eq a, ToRenderable c) => Behavior a -> (a -> c) -> Now DrawingArea
+createChartWidget datafeed chartmaker = do
+    box <- sync $ drawingAreaNew
+    initdata <- sample datafeed
+    chartref <- sync $ newIORef (chartmaker initdata)
+    let doDraw :: C.Render ()
+        doDraw = do
+            w <- fromIntegral <$> liftIO (widgetGetAllocatedWidth box)
+            h <- fromIntegral <$> liftIO (widgetGetAllocatedHeight box)
+            chart <- liftIO $ readIORef chartref
+            void $ runBackend (defaultEnv bitmapAlignmentFns) (render (toRenderable chart) (w,h))
+    sync $ on box draw doDraw
+    callIOStream (\dat -> writeIORef chartref (chartmaker dat) >> widgetQueueDraw box) (toChanges datafeed)
+    return box
+
+createLoadableGrammar :: Maybe Window -> Behavior (S.Set T.Text) -> EvStream PhonoGrammar -> Now (VBox, Behavior (Maybe PhonoGrammar))
+createLoadableGrammar transwin validsegs extreplace = do
+
+    (grammarLoaded, loadReplace) <- callbackStream
+    let grammarChanged = merge grammarLoaded (fmap Just extreplace)
+    currentGrammar <- sample $ fromChanges Nothing grammarChanged
+
+    let lenData = fmap (fmap lengthDist) currentGrammar
+        lenChart mdat = layout where
+            layout = def & layout_x_axis . laxis_title .~ "Word Length (Segments)"
+                         & layout_y_axis . laxis_title .~ "Frequency"
+                         & layout_x_axis . laxis_override .~ axisGridHide
+                         & layout_left_axis_visibility .~ AxisVisibility True False False
+                         & layout_y_axis . laxis_override .~ (\ad -> ad{_axis_grid = [], _axis_ticks = [], _axis_labels = []})
+                         & layout_legend .~ Nothing
+                         & layout_plots .~ fmap plotBars mbars
+            mbars = case mdat of
+                Nothing -> []
+                Just arr -> let
+                    total :: Double = fromIntegral (sum arr)
+                    bardata = fmap (\(x,y) -> (x, [fromIntegral y / total])) (assocs arr)
+                    barplot = def & plot_bars_titles .~ [""]
+                                  & plot_bars_values .~ bardata
+                                  & plot_bars_spacing .~ BarsFixGap 0 5
+                    in [barplot]
+
+    let rulelist (PhonoGrammar _ cs ws) = reverse (zip cs (coords ws))
+        rulefeed = fmap (maybe [] rulelist) currentGrammar
+        gvalid = do
+            segs <- validsegs
+            let allValid (ClassGlob _ _ gp) = all (\(_,NClass _ fs) -> all (\(_,f) -> S.member f segs) fs) gp
+            cg <- currentGrammar
+            return $ fmap (\(PhonoGrammar _ g _) -> all allValid g) cg
+        validdesc = ffor gvalid $ \case
+            Just True -> ""
+            Just False -> "Invalid Features Detected, will ignore"
+            Nothing -> "No Grammar Loaded"
+
+    lenchartdisplay <- createChartWidget lenData lenChart
+    validlabel <- createLabelDisplay validdesc
+    (ruledisplay,_) <- createListDisplay rulefeed $ do
+        tvColumn "Weight" $ tvTextDisplay (\(_,w) -> T.pack (showFFloat (Just 2) w []))
+        tvColumn "Constraint" $ tvShowDisplay fst
+
+    (loadButton, loadPressed) <- createButton (Just "document-open") (Just "Load Grammar")
+    (saveButton, savePressed) <- createButton (Just "document-save") (Just "Save Grammar")
+    setAttr widgetSensitive saveButton (fmap isJust currentGrammar)
+
+    vb <- createVBox 2 $ do
+        bpack =<< createFrame ShadowIn =<< set' [widgetHeightRequest := 125] lenchartdisplay
+        bstretch  =<< createFrame ShadowIn =<< createScrolledWindow ruledisplay
+        bpack <=< createHBox 2 $ do
+            bstretch =<< set' [widgetWidthRequest := 125, widgetMarginRight := 10] validlabel
+            bpack loadButton
+            bpack saveButton
+
+    txtfilter <- sync fileFilterNew
+    allfilter <- sync fileFilterNew
+
+    sync $ do
+        fileFilterAddMimeType txtfilter "text/*"
+        fileFilterSetName txtfilter "Text Files"
+        fileFilterAddPattern allfilter "*"
+        fileFilterSetName allfilter "All Files"
+
+    loadDialog <- sync $ fileChooserDialogNew (Just "Load Grammar") transwin FileChooserActionOpen
+        [("gtk-cancel", ResponseCancel), ("gtk-open", ResponseAccept)]
+    sync $ fileChooserAddFilter loadDialog txtfilter
+    sync $ fileChooserAddFilter loadDialog allfilter
+    flip callStream loadPressed $ \_ -> do
+        filePicked <- runFileChooserDialog loadDialog
+        planNow . ffor filePicked $ \case
+            Nothing -> return never
+            Just fn -> async $ do
+                rawfile <- fmap (T.decodeUtf8With T.lenientDecode) (B.readFile fn)
+                mg <- evaluate . force $ parseGrammar rawfile
+                loadReplace mg
+                putStrLn $ case mg of
+                    Just _ -> "Grammar loaded: " ++ fn
+                    Nothing -> "Invalid Grammar: " ++ fn
+        return ()
+
+    saveDialog <- sync $ fileChooserDialogNew (Just "Save Grammar") transwin FileChooserActionSave
+        [("gtk-cancel", ResponseCancel), ("gtk-save", ResponseAccept)]
+    sync $ fileChooserAddFilter saveDialog txtfilter
+    sync $ fileChooserAddFilter saveDialog allfilter
+    flip callStream savePressed $ \_  -> do
+        mg <- sample currentGrammar
+        case mg of
+            Just g -> do
+                savePicked <- runFileChooserDialog saveDialog
+                planNow . ffor savePicked $ \case
+                    Nothing -> return ()
+                    Just fn -> do
+                        async $ do
+                            let out = serGrammar g
+                                binout = T.encodeUtf8 out
+                            B.writeFile fn binout
+                            putStrLn $ "Wrote Grammar " ++ fn
+                        return ()
+                return ()
+            Nothing -> return ()
+
+    return (vb, currentGrammar)
diff --git a/app/LearnerControls.hs b/app/LearnerControls.hs
new file mode 100644
--- /dev/null
+++ b/app/LearnerControls.hs
@@ -0,0 +1,220 @@
+{-# LANGUAGE LambdaCase, OverloadedStrings, ExtendedDefaultRules, TupleSections, RecursiveDo #-}
+module LearnerControls where
+
+import Graphics.UI.Gtk
+import Control.FRPNow as FRP hiding (swap, when)
+import Control.FRPNow.GTK
+import Control.Monad
+import Control.Monad.Trans
+import Control.Monad.Reader
+import Control.Exception
+import Control.Concurrent
+import Control.Concurrent.MVar
+import Control.Monad.State
+import Data.Foldable
+import Data.Monoid
+import Data.Tuple
+import Data.Tuple.Select
+import Data.Maybe
+import Data.List
+import Text.PhonotacticLearner.PhonotacticConstraints
+import Text.PhonotacticLearner.PhonotacticConstraints.Generators
+import Text.PhonotacticLearner.PhonotacticConstraints.FileFormats
+import Text.PhonotacticLearner.MaxentGrammar
+import Text.PhonotacticLearner.Util.Probability
+import Text.PhonotacticLearner.DFST
+import Text.PhonotacticLearner
+import qualified Data.Text as T
+import qualified Data.Text.Encoding as T
+import qualified Data.Text.Encoding.Error as T
+import qualified Data.ByteString as B
+import qualified Data.Map.Lazy as M
+import qualified Data.Set as S
+import Data.Array.IArray
+import Control.DeepSeq
+import Control.Arrow
+import Text.Read (readMaybe)
+import System.Random (getStdRandom)
+import System.IO
+import Control.Parallel
+
+default (T.Text)
+
+isSorted :: (Ord a) => [a] -> Bool
+isSorted []       = True
+isSorted [x]      = True
+isSorted (x:xs@(y:_)) = x < y && isSorted xs
+
+parAhead :: [a] -> [a]
+parAhead [] = []
+parAhead [x] = [x]
+parAhead (x:y:xs) = (y `par` x : parAhead (y:xs))
+
+chunkList :: Int -> [a] -> [[a]]
+chunkList _ [] = []
+chunkList n xs = let (y,ys) = splitAt n xs in y : chunkList n ys
+
+parListChunk :: (NFData a) => Int -> [a] -> [a]
+parListChunk n = join . parAhead . fmap force . chunkList n
+
+generateSalad :: (Double -> T.Text -> IO ()) -> FeatureTable String -> PhonoGrammar -> Int -> IO [LexRow]
+generateSalad progcb ft (PhonoGrammar lendist rules ws) n = do
+    let nrules = length rules
+        lencdf = massToCdf (fmap (second fromIntegral) (assocs lendist))
+        blankdfa :: MulticountDFST SegRef
+        blankdfa = pruneAndPack . nildfa $ srBounds ft
+        addRule :: ClassGlob -> (MulticountDFST SegRef, Int) -> IO (MulticountDFST SegRef, Int)
+        addRule r (g,n) = do
+            g' <- evaluate . pruneAndPack $ rawIntersection consMC (unpackDFA . cgMatchCounter ft $ r) (unpackDFA g)
+            progcb (0.95 * (fromIntegral n / fromIntegral nrules)) (T.pack ("Building DFA: " ++ show n ++ "/" ++ show nrules))
+            return (g',n+1)
+
+    dfa <- fmap fst $ foldrM addRule (blankdfa,1) rules
+
+    progcb 1 "Running Generator"
+
+    salad <- getStdRandom . runState $ sampleWordSalad (fmap (maxentProb ws) (unpackDFA dfa)) lencdf n
+
+    let saladLex = wordFreqs . sortLexicon . fmap (\x -> (x,1)) $ salad
+    return $ fmap (\(w,f) -> LexRow (refsToSegs ft w) f) saladLex
+
+
+
+createPhonotacticLearnerWidget :: Behavior (FeatureTable String)
+                               -> Behavior [LexRow]
+                               -> Behavior (Maybe PhonoGrammar)
+                               -> Now (Notebook, HBox, EvStream [LexRow], EvStream PhonoGrammar)
+createPhonotacticLearnerWidget dynft dynlex dyngrammar = mdo
+    (grammarOut,outputGrammar) <- callbackStream
+    (lexOut, outputLex) <- callbackStream
+
+    let dynfeats = fmap (elems . featNames) dynft
+        dynCoreItems = fmap (fmap (\f -> (f, "[±" <> f <> "]"))) dynfeats
+
+    (cbEdges,useEdges) <- createCheckButton "Allow word-boundary constraints" False
+    (cbTrigrams,useTrigrams) <- createCheckButton "Allow trigram constraints using these core classes:" False
+    (listTrigrams,trigramsCore) <- createDynamicChecklist dynCoreItems
+    (cbBroken,useBroken) <- createCheckButton "Allow trigram constraints using these separator classes:" False
+    (listBroken,brokenCore) <- createDynamicChecklist dynCoreItems
+
+    sync $ set listTrigrams [widgetMarginLeft := 20]
+    sync $ set listBroken [widgetMarginLeft := 20]
+    setAttr widgetSensitive listTrigrams useTrigrams
+    setAttr widgetSensitive listBroken useBroken
+
+    (threshEntry,threshText) <- createFilteredEntry (`elem` ("1234567890. "::String)) "0.01 0.1 0.2 0.3"
+    (learnSaladEntry, learnSaladVal) <- createIntSpinEntry (100,10000) 100 3000
+
+    (learnStartButton, learnStartPressed) <- createButton (Just "system-run") (Just "Start")
+
+    (gibberSizeEntry,gibberSizeVal) <- createIntSpinEntry (100,10000) 100 3000
+    (gibberStartButton, gibberStartPressed) <- createButton (Just "system-run") (Just "Start")
+
+
+    let threshVals :: Behavior (Maybe [Double])
+        threshVals = ffor threshText $ mfilter (all (<1)) . mfilter isSorted . mapM readMaybe . words
+        candsettings = do
+            ft <- dynft
+            ue <- useEdges
+            utri <- useTrigrams
+            mtri <- if utri then fmap Just trigramsCore else pure Nothing
+            ubrk <- useBroken
+            mbrk <- if ubrk then fmap Just brokenCore else pure Nothing
+            return (ft, CandidateSettings ue mtri mbrk)
+    (candidateData,candidatePending) <- mapBAsync done (0,0,[]) (force . uncurry candidateGrammar) candsettings
+
+    ugSpinner <- createSpinner candidatePending
+    ugHeader <- createLabelDisplay . ffor candidateData $ \(nclasses,ncand,_) ->
+        "UG currently contains " <> T.pack (show nclasses) <> " classes and " <> T.pack (show ncand) <> " candidates."
+
+    (progressSet, setProgress) <- callbackStream
+    progress <- sample $ fromChanges Nothing progressSet
+    let isPending = fmap isJust progress
+
+    pbar <- createProgressBar progress
+    (stopButton, stopPressed) <- createButton (Just "process-stop") (Just "Stop")
+    setAttr widgetSensitive stopButton isPending
+
+    setAttr widgetSensitive gibberStartButton $ do
+        mg <- dyngrammar
+        p <- isPending
+        return $ isJust mg && not p
+    setAttr widgetSensitive learnStartButton $ do
+        l <- dynlex
+        gp <- candidatePending
+        p <- isPending
+        tv <- threshVals
+        return $ not (null l) && not gp && not p && isJust tv
+
+    flip callStream gibberStartPressed $ \_ -> do
+        ft <- sample dynft
+        mgrammar <- sample dyngrammar
+        n <- sample gibberSizeVal
+        case mgrammar of
+            Just pg -> void $ do
+                (tdone, amdone) <- callback
+                clickedStop <- sample $ next stopPressed
+                sync $ setProgress (Just (0,"Statred Gibbering"))
+                thread <- sync . forkIO . flip finally (amdone () >> setProgress Nothing) $ do
+                    let progcb p s = mask_ $ setProgress (Just (p,s))
+                    salad <- generateSalad progcb ft pg n
+                    mask_ $ outputLex salad
+                doStop <- sample $ (sync (killThread thread) <$ clickedStop) `beforeE` tdone
+                planNow doStop
+            Nothing -> return ()
+
+    flip callStream learnStartPressed $ \_ -> do
+        ft <- sample dynft
+        l <- sample dynlex
+        (_,ncands,candglobs) <- sample candidateData
+        mthresh <- sample threshVals
+        nsalad <- sample learnSaladVal
+        when (not (null l) && isJust mthresh) $ do
+            let thresh = fromJust mthresh
+            (tdone, amdone) <- callback
+            clickedStop <- sample $ next stopPressed
+            sync $ setProgress (Just (0,"Statred Learning"))
+            thread <- sync . forkIO . flip finally (amdone () >> setProgress Nothing) $ let
+                nthresh = length thresh
+                cands = parListChunk 500 $ fmap (force . (id *** matchCounter)) candglobs
+                progresscb pass cand = mask_ $ let
+                    prg = (fromIntegral (pass-1) + (fromIntegral cand / fromIntegral ncands)) / fromIntegral nthresh
+                    txt = T.pack $ "Pass " ++ show pass ++ "/" ++ show nthresh ++ ": Processing candidate " ++ show cand ++ "/" ++ show ncands ++ "."
+                    in setProgress (Just (prg,txt))
+                grammarcb lenarr rules _ ws = mask_ $ outputGrammar (PhonoGrammar lenarr rules ws)
+                lexlist = ffor l $ \(LexRow w f) -> (segsToRefs ft w, f)
+                in void $ generateGrammarCB progresscb grammarcb nsalad thresh cands lexlist
+            doStop <- sample $ (sync (killThread thread) <$ clickedStop) `beforeE` tdone
+            planNow doStop
+            return ()
+
+    let allmargins n = [widgetMarginLeft := n, widgetMarginRight := n, widgetMarginTop := n, widgetMarginBottom := n]
+    controls <- createNotebook $ do
+        nbpage "Learn" <=< createScrolledViewport <=< set' (allmargins 10) <=< createVBox 5 $ do
+            bpack <=< set' [widgetMarginLeft := 5, widgetMarginRight := 5] <=< createHBox 0 $ do
+                bstretch ugHeader
+                bpack ugSpinner
+            bpack cbEdges
+            bpack cbTrigrams
+            bpack =<< set' [widgetMarginLeft := 20] listTrigrams
+            bpack cbBroken
+            bpack =<< set' [widgetMarginLeft := 20] listBroken
+            bpack <=< createExpander "Advanced Settings" False <=< set' [widgetMarginLeft := 20] <=< createGrid 5 2 $ do
+                gcell (1,1) =<< createLabel "Selection thresholds"
+                gcell (2,1) =<< set' [widgetHExpand := True] threshEntry
+                gcell (1,2) =<< createLabel "Selection salad size"
+                gcell (2,2) =<< set' [widgetHExpand := True] learnSaladEntry
+            bpack learnStartButton
+        nbpage "Gibber" <=< set' (allmargins 10) <=< createVBox 2 $ do
+            bpack <=< createHBox 5 $ do
+                bpack =<< createLabel "Number of words"
+                bstretch gibberSizeEntry
+            bspacer
+            bpack gibberStartButton
+
+    done <- getUnrealize controls
+    progcontrols <- createHBox 2 $ do
+        bstretch pbar
+        bpack stopButton
+
+    return (controls, progcontrols, lexOut, grammarOut)
diff --git a/app/LexiconEditor.hs b/app/LexiconEditor.hs
new file mode 100644
--- /dev/null
+++ b/app/LexiconEditor.hs
@@ -0,0 +1,227 @@
+{-# LANGUAGE LambdaCase, OverloadedStrings, ExtendedDefaultRules, TupleSections #-}
+
+module LexiconEditor (
+    LexRow(..), createEditableLexicon, segsFromFt
+) where
+
+import Graphics.UI.Gtk
+import Control.FRPNow hiding (swap, when)
+import Control.FRPNow.GTK
+import Control.Monad
+import Control.Exception
+import Data.Foldable
+import Data.Tuple
+import Data.Tuple.Select
+import Data.Maybe
+import Text.PhonotacticLearner.PhonotacticConstraints
+import Text.PhonotacticLearner.PhonotacticConstraints.FileFormats
+import Text.PhonotacticLearner
+import qualified Data.Text as T
+import qualified Data.Text.Encoding as T
+import qualified Data.Text.Encoding.Error as T
+import qualified Data.ByteString as B
+import qualified Data.Map.Lazy as M
+import qualified Data.Set as S
+import Control.DeepSeq
+import Text.Read (readMaybe)
+
+default(T.Text)
+
+data LexSourceType = FieroList | FieroText
+
+data LexSource = Custom | FromStored LexSourceType T.Text
+
+segsFromFt :: FeatureTable String -> S.Set String
+segsFromFt = M.keysSet . segLookup
+
+
+setLexContents :: TreeView -> S.Set String -> [LexRow] -> IO (ListStore LexRow)
+setLexContents editor segs initlist = do
+    model <- listStoreNew initlist
+    oldcols <- treeViewGetColumns editor
+    forM_ oldcols $ \col -> treeViewRemoveColumn editor col
+    treeViewSetModel editor model
+
+    wcol <- treeViewColumnNew
+    set wcol [treeViewColumnTitle := "Word", treeViewColumnExpand := True]
+    wcell <- cellRendererTextNew
+    set wcell [cellTextEditable := True]
+    cellLayoutPackStart wcol wcell True
+    treeViewAppendColumn editor wcol
+    cellLayoutSetAttributes wcol wcell model $ \(LexRow w _) -> [cellText := joinFiero segs w]
+    on wcell edited $ \[i] rawword -> do
+        let newword = segmentFiero segs rawword
+        LexRow w f <- listStoreGetValue model i
+        when (w /= newword) $ listStoreSetValue model i (LexRow newword f)
+
+    adj <- adjustmentNew 1 1 10000 1 10 0
+    fcol <- treeViewColumnNew
+    set fcol [treeViewColumnTitle := "Frequency"]
+    fcell <- cellRendererSpinNew
+    set fcell [cellTextEditable := True, cellRendererSpinAdjustment := adj]
+    cellLayoutPackStart fcol fcell True
+    treeViewAppendColumn editor fcol
+    cellLayoutSetAttributes fcol fcell model $ \(LexRow _ f) -> [cellText := show f]
+    on fcell edited $ \[i] newval -> do
+        LexRow w f <- listStoreGetValue model i
+        case readMaybe newval of
+            Just newfreq | (f /= newfreq) -> listStoreSetValue model i (LexRow w newfreq)
+            _ -> return ()
+
+    return model
+
+watchLexModel :: LexSource -> S.Set String -> ListStore LexRow -> Now (Behavior (LexSource, S.Set String, [LexRow]))
+watchLexModel src segs model = do
+    (lexChanged, changeLex) <- callbackStream
+    initlist <- sync $ listStoreToList model
+    let changecb = listStoreToList model >>= changeLex
+    sync $ do
+        on model rowChanged $ \_ _ -> changecb
+        on model rowInserted $ \_ _ -> changecb
+        on model rowDeleted $ \_ -> changecb
+    sample $ fromChanges (src, segs, initlist) (fmap (Custom, segs, ) lexChanged)
+
+
+
+createEditableLexicon :: Maybe Window -> Behavior (S.Set String) -> EvStream [LexRow] -> Now (VBox, Behavior [LexRow])
+createEditableLexicon transwin currentsegs extreplace = do
+    vb <- sync $ vBoxNew False 2
+    editor <- sync treeViewNew
+
+    (addButton,addPressed) <- createButton (Just "list-add") Nothing
+    (delButton,delPressed) <- createButton (Just "list-remove") Nothing
+    (loadListButton, loadListPressed) <- createButton (Just "document-open") (Just "Load Lexicon")
+    (loadTextButton, loadTextPressed) <- createButton (Just "document-open") (Just "Collate Text")
+    (saveButton, savePressed) <- createButton (Just "document-save") (Just "Save Lexicon")
+
+    vb <- createVBox 2 $ do
+        bstretch =<< createFrame ShadowIn =<< createScrolledWindow editor
+        bpack <=< createHBox 2 $ do
+            bpack addButton
+            bpack delButton
+            bspacer
+            bpack loadListButton
+            bpack loadTextButton
+            bpack saveButton
+
+    let segsChanged = toChanges currentsegs
+    (modelChanged, changeModel) <- callbackStream
+    (dLexChanged, changeDLex) <- callbackStream
+    initsegs <- sample $ currentsegs
+    initmodel <- sync $ setLexContents editor initsegs []
+    initDLex <- watchLexModel Custom initsegs initmodel
+
+    currentModel <- sample $ fromChanges initmodel modelChanged
+    currentLex <- sample $ foldrSwitch initDLex dLexChanged
+
+    flip callStream addPressed $ \_ -> do
+        (store) <- sample currentModel
+        let newRow = LexRow [] 1
+        sync $ listStoreAppend store newRow
+        return ()
+    flip callStream delPressed $ \_ -> do
+        (store) <- sample currentModel
+        (cur, _) <- sync $ treeViewGetCursor editor
+        sync $ case cur of
+            [i] -> listStoreRemove store i
+            _ -> return ()
+
+    txtfilter <- sync fileFilterNew
+    allfilter <- sync fileFilterNew
+    sync $ do
+        fileFilterAddMimeType txtfilter "text/*"
+        fileFilterSetName txtfilter "Text Files"
+        fileFilterAddPattern allfilter "*"
+        fileFilterSetName allfilter "All Files"
+
+    saveDialog <- sync $ fileChooserDialogNew (Just "Save Lexicon") transwin FileChooserActionSave
+        [("gtk-cancel", ResponseCancel), ("gtk-save", ResponseAccept)]
+    sync $ fileChooserAddFilter saveDialog txtfilter
+    sync $ fileChooserAddFilter saveDialog allfilter
+    flip callStream savePressed $ \_  -> do
+        (_,segs,rows) <- sample currentLex
+        savePicked <- runFileChooserDialog saveDialog
+        planNow . ffor savePicked $ \case
+            Nothing -> return ()
+            Just fn -> do
+                async $ do
+                    let out = serWordlist segs rows
+                        binout = T.encodeUtf8 out
+                    B.writeFile fn binout
+                    putStrLn $ "Wrote Feature Table " ++ fn
+                return ()
+        return ()
+
+    loadListDialog <- sync $ fileChooserDialogNew (Just "Load Lexicon") transwin FileChooserActionOpen
+        [("gtk-cancel", ResponseCancel), ("gtk-open", ResponseAccept)]
+    sync $ fileChooserAddFilter loadListDialog txtfilter
+    sync $ fileChooserAddFilter loadListDialog allfilter
+    flip callStream loadListPressed $ \_ -> do
+        filePicked <- runFileChooserDialog loadListDialog
+        loaded <- planNow . ffor filePicked $ \case
+            Nothing -> return never
+            Just fn -> async $ do
+                rawfile <- fmap (T.decodeUtf8With T.lenientDecode) (B.readFile fn)
+                evaluate rawfile
+                return (fn,rawfile)
+        planNow . ffor (join loaded) $ \(fn,rawfile) -> do
+            segs <- sample currentsegs
+            let initrows = parseWordlist segs rawfile
+                src = FromStored FieroList rawfile
+            newmodel <- sync $ setLexContents editor segs initrows
+            newDLex <- watchLexModel src segs newmodel
+            sync $ do
+                changeModel newmodel
+                changeDLex newDLex
+                putStrLn "Lexicon sucessfully loaded."
+        return ()
+
+    loadTextDialog <- sync $ fileChooserDialogNew (Just "Load Text For New Lexicon") transwin FileChooserActionOpen
+        [("gtk-cancel", ResponseCancel), ("gtk-open", ResponseAccept)]
+    sync $ fileChooserAddFilter loadTextDialog allfilter
+    sync $ fileChooserAddFilter loadTextDialog txtfilter
+    flip callStream loadTextPressed $ \_ -> do
+        filePicked <- runFileChooserDialog loadTextDialog
+        loaded <- planNow . ffor filePicked $ \case
+            Nothing -> return never
+            Just fn -> async $ do
+                rawfile <- fmap (T.decodeUtf8With T.lenientDecode) (B.readFile fn)
+                evaluate rawfile
+                return (fn,rawfile)
+        planNow . ffor (join loaded) $ \(fn,rawfile) -> do
+            segs <- sample currentsegs
+            let initrows = collateWordlist segs rawfile
+                src = FromStored FieroText rawfile
+            newmodel <- sync $ setLexContents editor segs initrows
+            newDLex <- watchLexModel src segs newmodel
+            sync $ do
+                changeModel newmodel
+                changeDLex newDLex
+                putStrLn "Lexicon sucessfully created."
+        return ()
+
+    flip callStream segsChanged $ \newsegs' -> do
+        let newsegs = last newsegs'
+        (src, oldsegs, oldrows) <- sample currentLex
+        let newrows = case src of
+                Custom -> let raw = serWordlist oldsegs oldrows
+                          in parseWordlist newsegs raw
+                FromStored FieroList raw -> parseWordlist newsegs raw
+                FromStored FieroText raw -> collateWordlist newsegs raw
+        newmodel <- sync $ setLexContents editor newsegs newrows
+        newDLex <- watchLexModel src newsegs newmodel
+        sync $ do
+            changeModel newmodel
+            changeDLex newDLex
+            putStrLn "Lexicon resegmented."
+
+    flip callStream extreplace $ \newrows' -> do
+        let newrows = last newrows'
+        segs <- sample currentsegs
+        newmodel <- sync $ setLexContents editor segs newrows
+        newDLex <- watchLexModel Custom segs newmodel
+        sync $ do
+            changeModel newmodel
+            changeDLex newDLex
+
+    return (vb, fmap sel3 currentLex)
diff --git a/app/Main.hs b/app/Main.hs
new file mode 100644
--- /dev/null
+++ b/app/Main.hs
@@ -0,0 +1,84 @@
+{-# LANGUAGE TypeOperators, RecursiveDo, ScopedTypeVariables, TemplateHaskell, QuasiQuotes, OverloadedStrings #-}
+
+module Main where
+
+import Graphics.UI.Gtk
+import Graphics.UI.Gtk.General.CssProvider
+import Graphics.UI.Gtk.General.StyleContext
+import Graphics.UI.Gtk.Abstract.Widget
+import Control.FRPNow
+import Control.FRPNow.GTK
+import Control.FRPNow.GTK.MissingFFI
+import Control.Monad
+import Control.Applicative
+import Control.Concurrent
+import Control.Monad.Trans
+import qualified Data.Text as T
+import qualified Data.Text.Encoding as T
+import qualified Data.Map.Lazy as M
+import qualified Data.Set as S
+import Text.PhonotacticLearner.PhonotacticConstraints
+import Data.Array.IArray
+import Data.FileEmbed
+import Text.RawString.QQ
+import Data.Maybe
+import FeatureTableEditor
+import LexiconEditor
+import GrammarEditor
+import LearnerControls
+import System.IO
+
+ipaft :: FeatureTable String
+ipaft = fromJust . csvToFeatureTable id . T.unpack . T.decodeUtf8 $ $(embedFile "app/ft-ipa.csv")
+
+css :: String
+css = [r|
+#featuretable{
+    background-color: @theme_base_color;
+    padding: 5px;
+    font-size: 80%;
+}
+#featuretable label {
+    padding: 0 2px;
+}
+#featuretable .oddcol {
+    background-color: mix(@theme_base_color,@theme_bg_color,0.5);
+}
+#featuretable .segheader {font-weight: bold;}
+#featuretable .featheader {font-weight: bold;}
+#featuretable .featzero {color: mix(@theme_fg_color, transparent, 0.35);}
+
+|]
+
+main :: IO ()
+main = runNowGTK $ do
+    sync $ hSetEncoding stdout utf8
+    sync $ hSetBuffering stdout LineBuffering
+    -- example gtk app
+    -- initialization code
+    window <- sync $ windowNew
+
+    rec (fteditor, dynft) <- createEditableFT (Just window) ipaft
+        (lexeditor, dynlex) <- createEditableLexicon (Just window) (fmap segsFromFt dynft) lexout
+        (grammareditor, dyngrammar) <- createLoadableGrammar (Just window) (fmap (M.keysSet . featLookup) dynft) grammarout
+        (controls,pbar,lexout,grammarout) <- createPhonotacticLearnerWidget dynft dynlex dyngrammar
+
+    sync $ do
+        sp <- cssProviderNew
+        cssProviderLoadFromString sp css
+        thescreen <- widgetGetScreen window
+        styleContextAddProviderForScreen thescreen sp 600
+
+        centerpanes <- set' [panedWideHandle := False] =<< createVPaned controls fteditor
+        rpanes <- set' [panedWideHandle := False] =<< createHPaned centerpanes grammareditor
+        lpanes <- set' [panedWideHandle := False] =<< createHPaned lexeditor rpanes
+        box <- createVBox 0 $ do
+            bstretch lpanes
+            bpack =<< liftIO (vSeparatorNew)
+            bpack pbar
+
+        containerAdd window box
+
+    sync $ window `on` deleteEvent $ liftIO mainQuit >> return False
+
+    sync $ widgetShowAll window
diff --git a/app/ft-ipa.csv b/app/ft-ipa.csv
new file mode 100644
--- /dev/null
+++ b/app/ft-ipa.csv
@@ -0,0 +1,17 @@
+            ,t,d,s,z,ɬ,ɮ,ʃ,ʒ,c,ɟ,p,b,f,v,k,ɡ,x,ɣ,h,ɦ,ʔ,m,n,ŋ,ɲ,l,ʎ,ʟ,ⱱ,ɽ,r,ʀ,ʋ,j,w,i,y,ɪ,ʏ,ɯ,u,ʊ,e,ø,ɤ,o,ə,ɛ,œ,ʌ,ɔ,æ,ɐ,a,ɶ,ɑ,ɒ
+syllabic,    -,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+
+sonorant,    -,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+
+consonantal, +,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,-,-,-,+,+,+,+,+,+,+,+,+,+,+,+,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-
+continuant,  -,-,+,+,+,+,+,+,-,-,-,-,+,+,-,-,+,+,+,+,-,-,-,-,-,+,+,+,-,-,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+
+nasal,       -,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,+,+,+,+,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-
+lateral,     -,-,-,-,+,+,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,+,+,+,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-
+labial,      -,-,-,-,-,-,-,-,-,-,+,+,+,+,-,-,-,-,-,-,-,+,-,-,-,-,-,-,+,-,-,-,+,+,+,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+coronal,     +,+,+,+,+,+,+,+,+,+,-,-,-,-,-,-,-,-,-,-,-,-,+,-,+,+,+,-,-,+,+,-,-,-,-,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+anterior,    +,+,+,+,+,+,-,-,-,-,0,0,0,0,0,0,0,0,0,0,0,0,+,0,-,+,-,0,0,-,+,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+dorsal,      -,-,-,-,-,-,-,-,-,-,-,-,-,-,+,+,+,+,-,-,-,-,-,+,-,-,-,+,-,-,-,+,-,-,+,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+round,       0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-,+,-,+,+,+,+,-,+,-,+,-,-,+,-,+,-,-,-,+,-,+
+back,        0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-,-,-,-,+,+,+,-,-,+,+,-,-,-,+,+,-,-,-,-,+,+
+high,        0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,+,+,+,+,+,+,+,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-
+low,         0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,-,+,+,+,+,+,+
+ATR,         0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,+,+,-,-,-,+,-,+,+,+,+,0,-,-,-,-,-,-,-,-,-,-
+voice,       -,+,-,+,-,+,-,+,-,+,-,+,-,+,-,+,-,+,-,+,-,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+
diff --git a/maxent-learner-hw-gui.cabal b/maxent-learner-hw-gui.cabal
new file mode 100644
--- /dev/null
+++ b/maxent-learner-hw-gui.cabal
@@ -0,0 +1,50 @@
+name:                maxent-learner-hw-gui
+version:             0.2.0
+synopsis:            GUI for maxent-learner-hw
+description:         This is a GUI frontent for maxent-learner-hw using GTK.
+homepage:            https://github.com/george-steel/maxent-learner
+license:             GPL
+license-file:        LICENSE
+author:              George Steel
+maintainer:          george.steel@gmail.com
+copyright:           2016-2017 George Steel and Peter Jurgec
+category:            Linguistics
+build-type:          Simple
+extra-source-files:  app/ft-ipa.csv
+cabal-version:       >=1.10
+
+executable phono-learner-hw-gui
+  hs-source-dirs:      app
+  main-is:             Main.hs
+  other-modules:       FeatureTableEditor
+                       GrammarEditor
+                       LearnerControls
+                       LexiconEditor
+  ghc-options:         -Wall -threaded -rtsopts -with-rtsopts=-N
+  build-depends:       base >= 4.7 && < 5
+                     , maxent-learner-hw == 0.2.0
+                     , containers == 0.5.*
+                     , text == 1.2.*
+                     , file-embed
+                     , parallel == 3.2.*
+                     , deepseq == 1.4.*
+                     , array >= 0.3 && < 0.6
+                     , mtl >= 2.1 && < 2.3
+                     , transformers
+                     , random == 1.1
+                     , gtk3
+                     , glib
+                     , frpnow
+                     , frpnow-gtk3 == 0.2.0
+                     , raw-strings-qq
+                     , bytestring
+                     , tuple
+                     , async
+                     , cairo
+                     , Chart
+                     , Chart-cairo
+  default-language:    Haskell2010
+
+source-repository head
+  type:     git
+  location: https://github.com/george-steel/maxent-learner
