Haskell

Recently I hake taken a break from F# and tried to learn Haskell which is one of the language inspired F#. I would like to educate myself more on the fundamental concepts in functional programming before I go further into F#. Haskell seems to be simpler than F# and has been developed for near twenty years. It is officially available in various platform including Windows, Mac OS X and Linux. Haskell platform is the starting point.