1 We collect here versions of the programming languages we'll be looking at that you can run in your web browser:
4 * [[Untyped lambda calculus evaluator]] on this site; also a [library](/lambda_library) of lambda-calculus arithmetical and list operations (some relatively advanced)
7 * [Scheme](http://tryscheme.sourceforge.net/)
9 * [OCaml](http://try.ocamlpro.com/)
11 * [Haskell](http://tryhaskell.org/) <!-- similar websites listed at https://wiki.haskell.org/Learning_Haskell#Trying_Haskell_online -->