Haskell

Haskell is a pure functional programming language; it is the result of a collaborative design effort started in 1987 with the goal of establishing a unifying language for most of the different research efforts in pure functional programming that had so far used many different languages. Up-to-date information can be obtained from haskell.org.

You can find some of my own Haskell projects online:

RATH - a framework for relation-algebraic computation and exploration
Eddi - a graph diagram editor and calculator
Editor Combinators
Beyond Pretty-Printing: Galley Concepts in Document Formatting Combinators

Besides, I also contributed to the discussion about module systems in Haskell with [Kahl-Scheffczyk-2001].

I use Haskell in teaching, too; for that purpose I have a course-specific language resource page.

Wolfram Kahl