diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright Louis Pan (c) 2017
+
+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 Louis Pan 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/README.md b/README.md
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+++ b/README.md
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+[![Hackage](https://img.shields.io/hackage/v/arrow-extras.svg)](https://hackage.haskell.org/package/arrow-extras)
+[![Build Status](https://secure.travis-ci.org/louispan/arrow-extras.png?branch=master)](http://travis-ci.org/louispan/arrow-extras)
+
+Extra functions for Control.Arrow
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
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+import Distribution.Simple
+main = defaultMain
diff --git a/arrow-extras.cabal b/arrow-extras.cabal
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+++ b/arrow-extras.cabal
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+name:                arrow-extras
+version:             0.1.0.0
+synopsis:            Extra functions for Control.Arrow
+description:         Extra functions for Control.Arrow
+homepage:            https://github.com/louispan/arrow-extras#readme
+license:             BSD3
+license-file:        LICENSE
+author:              Louis Pan
+maintainer:          louis@pan.me
+copyright:           2017 Louis Pan
+category:            Control
+build-type:          Simple
+extra-source-files:  README.md
+cabal-version:       >=1.10
+
+library
+  hs-source-dirs:      src
+  exposed-modules:     Control.Arrow.Extras
+  build-depends:       base >= 4.7 && < 5
+  default-language:    Haskell2010
+
+source-repository head
+  type:     git
+  location: https://github.com/louispan/arrow-extras
diff --git a/src/Control/Arrow/Extras.hs b/src/Control/Arrow/Extras.hs
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+++ b/src/Control/Arrow/Extras.hs
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+module Control.Arrow.Extras where
+
+import Control.Arrow
+
+-- | Feed the output of second arrow into the output of the first arrow.
+-- Can be used to emulate Applicative <*> like usage:
+--
+-- @
+-- foo :: Appplicative f => f a -> f b -> f (a, b)
+-- (,) <$> a <*> b
+-- @
+--
+-- The arrow version is:
+--
+-- @
+-- foo :: Arrow p => p x a -> p x b -> p x (a, b)
+-- arr (const (,)) >*> a >*> b
+-- @
+(>*>) :: Arrow p => p a (b -> c)
+    -> p a b
+    -> p a c
+af >*> ab = af &&& ab >>^ (fst <*> snd)
+
+-- | precomposition with a pure value
+(<<^=) :: Arrow a => a c d -> c -> a x d
+p <<^= v = p <<^ const v
+
+-- | postcomposition with a pure value
+(>>^=) :: Arrow a => a b c -> d -> a b d
+p >>^= v = p >>^ const v
+
+-- | postcomposition with a pure value (right-to-left variant)
+(=^<<) :: Arrow a => d -> a b c -> a b d
+v =^<< p = const v ^<< p
+
+-- | precomposition with a pure value (right-to-left variant)
+(=^>>) :: Arrow a => c -> a c d -> a x d
+v =^>> p = const v ^>> p