Links

Haskell
The purely lazy functional programming language.
Haskell Wikibook
The Haskell wikibook, hosted on the wikibooks project. The goal is to build a community textbook about Haskell that is at once free (as in freedom and in beer), gentle, and comprehensive. Contributors most welcome!
The Fun of Programming
A marvelous collection (book) of fun articles about Haskell and programming with it.