An application to work with the lambda calculus (for learning) http://scravy.de/blog/2012-02-20/a-lambda-toolbox-in-haskell.htm
|Latest on Hackage:||1.0.1|
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lambda-toolbox allows one to reduce lambda expressions step by step, performing alpha-, beta-, and eta-reduction. It's a tool intended for beginners to play with the lambda calculus.
$ lambda-toolbox -h
will tell you everything relevant.