Order is a metaprogramming language based on the CPP macro language. See also http://sourceforge.net/projects/chaos-pp I have not yet understood the relation between Order and Chaos.
Yet another documentation system for Common Lisp. This one is rudimentatry (hence the name) and only works on LispWorks, but it might still be useful for SigLab. It looks very easy to use.
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}