diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright (c) 2013, Andrew Miller
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Chris Done nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/fay-ref.cabal b/fay-ref.cabal
new file mode 100644
--- /dev/null
+++ b/fay-ref.cabal
@@ -0,0 +1,23 @@
+name:                fay-ref
+version:             0.1.0.0
+synopsis:            Like IORef but for Fay.
+description:         Like IORef but for Fay.
+homepage:            https://github.com/A1kmm/fay-ref
+bug-reports:         https://github.com/A1kmm/fay-ref/issues
+license:             BSD3
+license-file:        LICENSE
+author:              Andrew Miller
+maintainer:          Andrew Miller <andrew@amxl.com>
+copyright:           Andrew Miller
+build-type:          Simple
+cabal-version:       >=1.8
+data-files: src/FayRef.hs
+category:	     Fay
+source-repository head
+  type: git
+  location: https://github.com/A1kmm/fay-ref
+
+library
+  hs-source-dirs: src
+  exposed-modules: FayRef
+  build-depends: fay-base >= 0.14.1.0
diff --git a/src/FayRef.hs b/src/FayRef.hs
new file mode 100644
--- /dev/null
+++ b/src/FayRef.hs
@@ -0,0 +1,36 @@
+{-# LANGUAGE PackageImports #-}
+module FayRef (FayRef, newFayRef, readFayRef, writeFayRef, modifyFayRef,
+               modifyFayRef') where
+
+import Prelude
+import FFI
+
+-- |A mutable variable in the 'Fay' monad.
+data FayRef a = FayRef
+
+-- |Build a new 'FayRef'.
+newFayRef :: a -> Fay (FayRef a)
+newFayRef = ffi "{contents: %1}"
+
+-- |Write a new value into a 'FayRef'.
+readFayRef :: FayRef a -> Fay a
+readFayRef = ffi "%1['contents']"
+
+-- |Write a new value into a 'FayRef'.
+writeFayRef :: FayRef a -> a -> Fay ()
+writeFayRef = ffi "%1['contents']=%2"
+
+-- |Mutate the contents of a 'FayRef'.
+--
+-- Be warned that 'modifyFayRef' does not apply the function strictly.  This
+-- means if the program calls 'modifyFayRef' many times, but seldomly uses the
+-- value, thunks will pile up in memory resulting in a space leak.
+modifyFayRef :: FayRef a -> (a -> a) -> Fay ()
+modifyFayRef ref f = readFayRef ref >>= (writeFayRef ref . f)
+
+-- |Strict version of 'modifyFayRef'
+modifyFayRef' :: FayRef a -> (a -> a) -> Fay ()
+modifyFayRef' ref f = do
+    x <- readFayRef ref
+    let x' = f x
+    writeFayRef ref $! x'