The Xoltar Toolkit contains utility modules for Python, including functional programming support, lazy expressions and data structures, and thread pools. It includes support for closures, curried functions, lazy expressions, lazy tuples (functional programming languages call these lazy lists, but since lists are mutable in Python, tuples are closer in meaning), and lazy equivalents for map, filter, reduce, and zip. It also includes some higher-order functions for composing functions. WWW: http://sourceforge.net/projects/xoltar-toolkit/ See also: http://www-106.ibm.com/developerworks/library/l-prog.html