The Friend of a Friend (FOAF) project is creating a Web of machine-readable pages describing people, the links between them and the things they create and do.
A book introducing basic concepts from computational number theory and algebra, including all the necessary mathematical background. Available as PDF under a creative commons license and as book from Cambridge University Press. (Recommended by Mark Wooding).
Another (after Kevin Layer's) EXIF facility in CL. The documentation (dictionary) looks nice--was it generated by a tool? TODO: register Kevin's version in the common lisp directory
Just a backup of the very nice Richard W.M. Jones Forth interpreter. On Eric Raymond's blog http://esr.ibiblio.org/?p=6839#more-6839 somebody recommended reading jonesforth.{S,f}