This is old. Instead checkout: https://github.com/fantasyland/fantasy-land https://github.com/folktale https://github.com/DrBoolean/lenses https://github.com/DrBoolean/pointfree-fantasy https://github.com/loop-recur/lambdajs Lots of functional libs all modified to work with web/titanium/node environments. Oliver Steele's functional library: http://osteele.com/sources/javascript/functional/ Sjoerd Visscher's algebraic data type library: http://w3future.com/weblog/stories/2008/06/16/adtinjs.xml Bram Stein's matching library: http://www.bramstein.com/ Probably needs better organization... Feel free to chip in!