pyWeb is a Literate Programming tool that will work with any markup language and any programming langauge. The idea is to allow you to create great documentation with as constraints or limitations.
WESP is a collection of subtle scripts and programs written in several languages (C, /bin/sh, (g)awk, ruby, icon) that breaths a new life into the WEB system for literate programming by Donald Knuth (and CWEB by Knuth/Sylvio Levy).
Erc is an interpreted link-oriented language. Majic is a java-based interpreter for Erc, and Majicc is a c++ based compiler for Erc which uses the Majic libraries.