diff --git a/Data/Profunctor/Composition.hs b/Data/Profunctor/Composition.hs
new file mode 100644
--- /dev/null
+++ b/Data/Profunctor/Composition.hs
@@ -0,0 +1,16 @@
+{-# LANGUAGE GADTs #-}
+module Data.Profunctor.Composition 
+  ( Compose(..)
+  ) where
+
+import Data.Profunctor
+
+data Compose f g d c where
+  Compose :: f d a -> g a c -> Compose f g d c 
+
+instance (Profunctor f, Profunctor g) => Profunctor (Compose f g) where
+  lmap k (Compose f g) = Compose (lmap k f) g
+  rmap k (Compose f g) = Compose f (rmap k g)
+
+instance Profunctor g => Functor (Compose f g a) where
+  fmap k (Compose f g) = Compose f (rmap k g)
diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright 2011 Edward Kmett
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+2. 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.
+
+3. Neither the name of the author nor the names of his contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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.lhs b/Setup.lhs
new file mode 100644
--- /dev/null
+++ b/Setup.lhs
@@ -0,0 +1,7 @@
+#!/usr/bin/runhaskell
+> module Main (main) where
+
+> import Distribution.Simple
+
+> main :: IO ()
+> main = defaultMain
diff --git a/profunctor-extras.cabal b/profunctor-extras.cabal
new file mode 100644
--- /dev/null
+++ b/profunctor-extras.cabal
@@ -0,0 +1,30 @@
+name:          profunctor-extras
+category:      Control, Categories
+version:       0.1
+license:       BSD3
+cabal-version: >= 1.6
+license-file:  LICENSE
+author:        Edward A. Kmett
+maintainer:    Edward A. Kmett <ekmett@gmail.com>
+stability:     experimental
+homepage:      git://github.com/ekmett/profunctors/
+copyright:     Copyright (C) 2011 Edward A. Kmett
+synopsis:      Profunctor extras
+description:   Profunctor extras
+build-type:    Simple
+
+source-repository head
+  type: git
+  location: git://github.com/ekmett/profunctors.git
+
+library
+  build-depends: 
+    base >= 4 && < 5,
+    semigroupoids >= 1.2.2 && <= 1.3,
+    comonad >= 1.1 && < 1.2,
+    profunctors >= 0.1 && < 0.2
+
+  exposed-modules:
+    Data.Profunctor.Composition
+
+  ghc-options:      -Wall