diff --git a/LICENSE.txt b/LICENSE.txt
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--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+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.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     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
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    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 3 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, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program 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, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU 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.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
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/hydrogen.cabal b/hydrogen.cabal
new file mode 100644
--- /dev/null
+++ b/hydrogen.cabal
@@ -0,0 +1,91 @@
+name:           hydrogen
+version:        0.2.0.0
+cabal-version:  >= 1.10
+build-type:     Simple
+license:        GPL-3
+license-file:   LICENSE.txt
+copyright:      (c) 2013-2015 Karl Voelker
+author:         Karl Voelker
+maintainer:     hydrogen@karlv.net
+stability:      experimental
+homepage:       https://www.github.com/ktvoelker/hydrogen
+bug-reports:    https://www.github.com/ktvoelker/hydrogen/issues
+synopsis:       An alternate Prelude
+description:
+  This is an alternative to "Prelude" that is not meant to depart drastically
+  from the standard. The principles of Hydrogen are:
+  .
+  1. Be total, not partial.
+  2. Use 'Data.Text.Text', not 'Data.String.String'.
+  3. Use generic functions, not "Data.List" functions.
+  4. Whatever is omitted should be replaced.
+  .
+  To use this package, use the `NoImplicitPrelude` language option, and import
+  "H.Prelude".
+category:       Prelude
+tested-with:    GHC == 7.8.3
+
+Source-repository head
+  type: git
+  location: https://github.com/ktvoelker/hydrogen.git
+
+Flag dev
+  Description: Enable developer mode
+  Default: False
+
+Library
+  default-language: Haskell2010
+  hs-source-dirs:   src
+  ghc-options:
+    -Wall
+    -fno-warn-name-shadowing
+  if flag(dev)
+    ghc-options:
+      -Werror
+  build-depends:
+    base       >= 4.7  && < 4.8,
+    bytestring >= 0.10 && < 0.11,
+    text       >= 1.2  && < 1.3,
+    containers >= 0.5  && < 0.6,
+    mtl        >= 2.1  && < 2.2,
+    pretty     >= 1.1  && < 1.2
+  exposed-modules:
+    H.Chan
+    H.IO
+    H.Prelude
+    H.Pretty
+  other-modules:
+    H.Import
+    H.Import.IO
+    H.Util
+  default-extensions:
+    NoImplicitPrelude
+    TupleSections
+    LambdaCase
+    OverloadedStrings
+
+Test-Suite test
+  type: exitcode-stdio-1.0
+  default-language: Haskell2010
+  hs-source-dirs: test
+  main-is: Main.hs
+  ghc-options:
+    -Wall
+    -fno-warn-name-shadowing
+  if flag(dev)
+    ghc-options:
+      -Werror
+  build-depends:
+    base       >= 4.7  && < 4.8,
+    containers >= 0.5  && < 0.6,
+    mtl        >= 2.1  && < 2.2,
+    QuickCheck >= 2.7  && < 2.8,
+    Cabal      >= 1.10,
+    hydrogen
+  default-extensions:
+    NoImplicitPrelude
+    TupleSections
+    LambdaCase
+    OverloadedStrings
+    TemplateHaskell
+
diff --git a/src/H/Chan.hs b/src/H/Chan.hs
new file mode 100644
--- /dev/null
+++ b/src/H/Chan.hs
@@ -0,0 +1,50 @@
+
+module H.Chan
+  ( ReadChan()
+  , WriteChan()
+  , RChan(..)
+  , WChan(..)
+  , RWChan()
+  , splitChan
+  , newSplitChan
+  , C.Chan
+  , C.newChan
+  ) where
+
+import qualified Control.Concurrent.Chan as C
+
+import H.IO
+import H.Prelude
+
+newtype ReadChan a = ReadChan (IO a)
+
+newtype WriteChan a = WriteChan (a -> IO ())
+
+class RChan chan where
+  readChan :: chan a -> IO a
+
+class WChan chan where
+  writeChan :: chan a -> a -> IO ()
+
+class (RChan chan, WChan chan) => RWChan chan where
+
+splitChan :: C.Chan a -> (ReadChan a, WriteChan a)
+splitChan chan = (ReadChan (C.readChan chan), WriteChan (C.writeChan chan))
+
+newSplitChan :: IO (ReadChan a, WriteChan a)
+newSplitChan = splitChan <$> C.newChan
+
+instance RChan ReadChan where
+  readChan (ReadChan r) = r
+
+instance WChan WriteChan where
+  writeChan (WriteChan w) = w
+
+instance RChan C.Chan where
+  readChan = C.readChan
+
+instance WChan C.Chan where
+  writeChan = C.writeChan
+
+instance RWChan C.Chan where
+
diff --git a/src/H/IO.hs b/src/H/IO.hs
new file mode 100644
--- /dev/null
+++ b/src/H/IO.hs
@@ -0,0 +1,16 @@
+
+module H.IO
+  ( module Data.Text.IO
+  , module H.Import.IO
+  , module H.IO
+  ) where
+
+import Data.Text.IO (putStr, putStrLn)
+import qualified System.Environment as E
+
+import H.Import
+import H.Import.IO
+
+getArgs :: (MonadIO m) => m [Text]
+getArgs = liftM (fmap pack) $ liftIO E.getArgs
+
diff --git a/src/H/Import.hs b/src/H/Import.hs
new file mode 100644
--- /dev/null
+++ b/src/H/Import.hs
@@ -0,0 +1,63 @@
+
+module H.Import
+  ( module Control.Applicative
+  , module Control.Category
+  , module Control.Monad
+  , module Control.Monad.Error
+  , module Control.Monad.Identity
+  , module Control.Monad.Reader
+  , module Control.Monad.State
+  , module Data.Bool
+  , module Data.ByteString
+  , module Data.Char
+  , module Data.Either
+  , module Data.Foldable
+  , module Data.Function
+  , module Data.List
+  , module Data.Map
+  , module Data.Maybe
+  , module Data.Monoid
+  , module Data.Ord
+  , module Data.Ratio
+  , module Data.Set
+  , module Data.Text
+  , module Data.Text.Encoding
+  , module Data.Traversable
+  , module Prelude
+  ) where
+
+import Control.Applicative
+import Control.Category
+import Control.Monad hiding
+  ( forM, forM_, mapM, mapM_, sequence, sequence_, msum )
+import Control.Monad.Error hiding
+  ( forM, forM_, mapM, mapM_, sequence, sequence_, msum, strMsg )
+import Control.Monad.Identity hiding
+  ( forM, forM_, mapM, mapM_, sequence, sequence_, msum )
+import Control.Monad.Reader hiding
+  ( forM, forM_, mapM, mapM_, sequence, sequence_, msum )
+import Control.Monad.State hiding
+  ( forM, forM_, mapM, mapM_, sequence, sequence_, msum )
+import Data.Bool
+import Data.ByteString (ByteString)
+import Data.Char
+import Data.Either
+import Data.Foldable
+import Data.Function hiding (id, (.))
+import Data.List (filter)
+import Data.Map (Map())
+import Data.Maybe
+import Data.Monoid
+import Data.Ord
+import Data.Ratio
+import Data.Set (Set())
+import Data.Text (Text(), pack, unpack)
+import Data.Text.Encoding (encodeUtf8, decodeUtf8)
+import Data.Traversable
+import Prelude
+  ( Num(..), Integral(..), Fractional(..), Real(..), RealFrac(..)
+  , Int, Integer, Rational, Eq(..), Enum(..), Bounded(..)
+  , undefined, Show(), Read(), fst, snd, asTypeOf
+  , (^)
+  )
+
diff --git a/src/H/Import/IO.hs b/src/H/Import/IO.hs
new file mode 100644
--- /dev/null
+++ b/src/H/Import/IO.hs
@@ -0,0 +1,9 @@
+
+module H.Import.IO
+  ( module System.Exit
+  , module System.IO
+  ) where
+
+import System.Exit
+import System.IO (IO, stdin, stdout, stderr)
+
diff --git a/src/H/Prelude.hs b/src/H/Prelude.hs
new file mode 100644
--- /dev/null
+++ b/src/H/Prelude.hs
@@ -0,0 +1,9 @@
+
+module H.Prelude
+  ( module H.Import
+  , module H.Util
+  ) where
+
+import H.Import
+import H.Util
+
diff --git a/src/H/Pretty.hs b/src/H/Pretty.hs
new file mode 100644
--- /dev/null
+++ b/src/H/Pretty.hs
@@ -0,0 +1,39 @@
+
+module H.Pretty
+  ( module Text.PrettyPrint
+  , module H.Pretty
+  ) where
+
+import qualified Prelude as P
+import qualified Text.PrettyPrint as PP
+import Text.PrettyPrint hiding
+  ( text, ptext, sizedText, zeroWidthText
+  , render, renderStyle, fullRender, TextDetails(..)
+  )
+
+import H.Prelude
+
+text :: Text -> Doc
+text = PP.text . unpack
+
+sizedText :: Int -> Text -> Doc
+sizedText n = PP.sizedText n . unpack
+
+zeroWidthText :: Text -> Doc
+zeroWidthText = PP.zeroWidthText . unpack
+
+render :: Doc -> Text
+render = pack . PP.render
+
+renderStyle :: Style -> Doc -> Text
+renderStyle s = pack . PP.renderStyle s
+
+fullRender :: Mode -> Int -> P.Float -> (TextDetails -> a -> a) -> a -> Doc -> a
+fullRender m ll rl f end doc = PP.fullRender m ll rl f' end doc
+  where
+    f' (PP.Chr c)   = f (Chr c)
+    f' (PP.Str xs)  = f (Str . pack $ xs)
+    f' (PP.PStr xs) = f (Str . pack $ xs)
+
+data TextDetails = Chr !Char | Str Text
+
diff --git a/src/H/Util.hs b/src/H/Util.hs
new file mode 100644
--- /dev/null
+++ b/src/H/Util.hs
@@ -0,0 +1,144 @@
+
+module H.Util where
+
+import qualified Control.Monad.Error as E
+import qualified Data.Map as M
+import qualified Data.Text as T
+import qualified Prelude as P
+
+import H.Import
+
+show :: (Show a) => a -> Text
+show = T.pack . P.show
+
+read :: (Read a) => Text -> Maybe a
+read = fmap fst . listToMaybe . P.reads . T.unpack
+
+todo :: a
+todo = error "Not implemented"
+
+error :: Text -> a
+error = P.error . T.unpack
+
+impossible :: Text -> a
+impossible = error . ("Impossible: " <>)
+
+-- | If the input is Just, do a monadic action on the value
+whenJust :: (Monad m) => Maybe a -> (a -> m ()) -> m ()
+whenJust x f = maybe (return ()) f x
+
+onFst :: (a -> c) -> (a, b) -> (c, b)
+onFst f (a, b) = (f a, b)
+
+onSnd :: (b -> c) -> (a, b) -> (a, c)
+onSnd f (a, b) = (a, f b)
+
+onFstF :: (Functor f) => (a -> f c) -> (a, b) -> f (c, b)
+onFstF f (a, b) = (, b) <$> f a
+
+onSndF :: (Functor f) => (b -> f c) -> (a, b) -> f (a, c)
+onSndF f (a, b) = (a, ) <$> f b
+
+lift2 :: (MonadTrans t, MonadTrans u, Monad m, Monad (u m)) => m a -> t (u m) a
+lift2 = lift . lift
+
+lift3
+  :: ( MonadTrans t
+     , MonadTrans u
+     , MonadTrans v
+     , Monad m
+     , Monad (u m)
+     , Monad (t (u m))
+     )
+  => m a
+  -> v (t (u m)) a
+lift3 = lift . lift . lift
+
+lift4
+  :: ( MonadTrans t
+     , MonadTrans u
+     , MonadTrans v
+     , MonadTrans w
+     , Monad m
+     , Monad (u m)
+     , Monad (t (u m))
+     , Monad (v (t (u m)))
+     )
+  => m a
+  -> w (v (t (u m))) a
+lift4 = lift . lift . lift . lift
+
+-- | Modify the state of a StateT using a monadic action of the inner monad.
+modifyM :: (Monad m) => (s -> m s) -> StateT s m ()
+modifyM = (>>= put) . (get >>=) . (lift .)
+
+-- | Find the minimum element of a list using a monadic comparison action.
+minimumByM :: (Monad m) => (a -> a -> m Ordering) -> [a] -> m a
+minimumByM _ [] = error "minimumByM: Empty list"
+minimumByM c (x : xs) = f x c xs
+  where
+    f acc _ [] = return acc
+    f acc c (x : xs) = do
+      o <- c x acc
+      case o of
+        LT -> f x c xs
+        _ -> f acc c xs
+
+data Proxy a = Proxy
+
+asProxied :: a -> Proxy a -> a
+asProxied = const
+
+infix 8 `asProxied`
+
+-- | Like <|>, but the operands may have different value types, with Either providing
+-- a union of those two types in the result
+eitherAlt :: (Alternative f) => f a -> f b -> f (Either a b)
+eitherAlt la ra = (Left <$> la) <|> (Right <$> ra)
+
+infixl 3 `eitherAlt`
+
+-- | Sequence a list of actions that return Maybes, stopping at the first Nothing
+sequenceWhileJust :: (Monad m) => [m (Maybe a)] -> m [a]
+sequenceWhileJust [] = return []
+sequenceWhileJust (m : ms) =
+  m >>= maybe (return []) (\x -> liftM (x :) $ sequenceWhileJust ms)
+
+-- | Deconstruct a list into its head and tail
+headView :: [a] -> Maybe (a, [a])
+headView [] = Nothing
+headView (x : xs) = Just (x, xs)
+
+-- | Get the first element of a triple
+fst3 :: (a, b, c) -> a
+fst3 (x, _, _) = x
+
+-- | Get the second element of a triple
+snd3 :: (a, b, c) -> b
+snd3 (_, x, _) = x
+
+-- | Get the third element of a triple
+thd3 :: (a, b, c) -> c
+thd3 (_, _, x) = x
+
+-- | Union two maps, with a monadic action for merging duplicates
+unionWithM :: (Ord k, Monad m) => (a -> a -> m a) -> Map k a -> Map k a -> m (Map k a)
+unionWithM f a b =
+  liftM M.fromList
+    . sequence
+    . fmap (\(k, v) -> liftM (k,) v)
+    . M.toList
+    $ M.unionWith f' (M.map return a) (M.map return b)
+  where
+    f' mx my = mx >>= \x -> my >>= \y -> f x y
+
+-- | Create an error from a message
+textMsg :: (Error a) => Text -> a
+textMsg = E.strMsg . unpack
+
+-- | Like when, but the condition is also a monadic action
+whenM :: (Monad m) => m Bool -> m () -> m ()
+whenM cond m = cond >>= \case
+  True  -> m
+  False -> return ()
+
diff --git a/test/Main.hs b/test/Main.hs
new file mode 100644
--- /dev/null
+++ b/test/Main.hs
@@ -0,0 +1,98 @@
+
+module Main where
+
+import Control.Monad.Writer
+import qualified Data.Map as M
+import H.IO
+import H.Prelude
+import qualified Prelude as P
+import Test.QuickCheck
+
+prop_show :: (Eq a, Show a) => a -> Bool
+prop_show x = unpack (show x) == P.show x
+
+prop_read_show :: (Eq a, Read a, Show a) => a -> Bool
+prop_read_show x = read (show x) == Just x
+
+prop_read_empty :: Bool
+prop_read_empty = read "" `asTypeOf` Just (0 :: Integer) == Nothing
+
+prop_whenJust :: (Eq a) => a -> Maybe a -> Bool
+prop_whenJust x y = f (whenJust y put) == f (maybe (return ()) put y)
+  where
+    f = flip execState x
+
+prop_onFst :: (Eq a, Num a) => (a, a) -> Bool
+prop_onFst x@(a, b) = onFst f x == (f a, b)
+  where
+    f = (+ 1)
+
+prop_onSnd :: (Eq a, Num a) => (a, a) -> Bool
+prop_onSnd x@(a, b) = onSnd f x == (a, f b)
+  where
+    f = (+ 1)
+
+prop_onFstF :: (Eq a, Num a) => Maybe a -> (a, a) -> Bool
+prop_onFstF r x@(a, b) = onFstF f x == fmap (, b) (f a)
+  where
+    f = const r
+
+prop_onSndF :: (Eq a, Num a) => Maybe a -> (a, a) -> Bool
+prop_onSndF r x@(a, b) = onSndF f x == fmap (a, ) (f b)
+  where
+    f = const r
+
+prop_modifyM :: Integer -> Integer -> Bool
+prop_modifyM x y = f a == f b
+  where
+    f :: StateT Integer (Writer [Integer]) () -> (Integer, [Integer])
+    f = runWriter . flip execStateT x
+    a = modifyM $ \old -> tell [old] >> return y
+    b = gets (: []) >>= tell >> put y
+
+prop_minimumByM :: [Integer] -> Property
+prop_minimumByM xs =
+  xs /= [] ==>
+    runIdentity (minimumByM (\a b -> return (compare a b)) xs) == minimum xs
+
+prop_eitherAlt :: Maybe Integer -> Maybe Rational -> Bool
+prop_eitherAlt x y = eitherAlt x y == ((Left <$> x) <|> (Right <$> y))
+
+prop_sequenceWhileJust :: [Maybe Integer] -> Bool
+prop_sequenceWhileJust xs = a == b
+  where
+    f Nothing    = return Nothing
+    f x@(Just n) = modify (+ n) >> return x
+    a = execState (sequenceWhileJust $ fmap f xs) 0
+    b = sum . catMaybes . P.takeWhile isJust $ xs
+
+prop_triples :: (Integer, Integer, Integer) -> Bool
+prop_triples x = (fst3 x, snd3 x, thd3 x) == x
+
+type IA = [(Integer, Integer)]
+
+prop_unionWithM :: IA -> IA -> Bool
+prop_unionWithM x y = a == b
+  where
+    x' = M.fromList x
+    y' = M.fromList y
+    a = runIdentity $ unionWithM ((return .) . (+)) x' y'
+    b = M.unionWith (+) x' y'
+
+prop_whenM :: Bool -> Integer -> Integer -> Integer -> Bool
+prop_whenM b x y z = f experiment == f control
+  where
+    f = flip execState x
+    experiment = whenM (put z >> return b) (put y)
+    control = put z >> when b (put y)
+
+-- For an explanation of this odd line, see:
+-- http://hackage.haskell.org/package/QuickCheck-2.7.6/docs/Test-QuickCheck.html#v:quickCheckAll
+return []
+
+runTests :: IO Bool
+runTests = $quickCheckAll
+
+main :: IO ()
+main = not <$> runTests >>= flip when exitFailure
+