CLOCC
The Common Lisp Open Code Collection contains Lisp code for various applications which is:

Common Lisp
i.e. runs in ANSI Common Lisp implementations
Free Software
according to the DFSG - Debian Free Software Guidelines (e.g. licensed under GPL, LGPL, MIT-LICENSE or BSD licenses, or Public Domain)
Portable
i.e. should be portable among CL implementations with low effort, and does not require modifications to the CL implementation itself
Self-contained
i.e. does not require packages not in this repository
Ready to use
i.e. runs out of the box in the free CL implementations, except for SBCL.<li>

Presently it includes mk-defsystem (3.6 and 4.0), CLOCC-PORT (portability code for networking and other CL extensions), and CLLIB ("a library of miscellaneous routines", including an XML parser among other things).