This is Travis' favorite language.
Books
O'Reilly Media - Real World Haskell
Articles
2006.01.19 - A Neighborhood of Infinity (Blog) - Eleven Reasons to use Haskell as a Mathematician
2010.07.29 - StackOverflow - Is Haskell suitable as a first language?
2014.12.31 - BiteMyApp - Various resources and books people use to learn Haskell
rec'd by Yang