I used to do a bunch of stuff on the SBCL project, but they have a ton of healthy other volunteers that take care of this stuff now. Here’s a list of stuff:

• Benchmarks of the current & of old versions of SBCL (a.k.a. boinkmarks): http://sbcl.boinkor.net/bench/ - turned off, see the retrospective
• Used to host The SBCL manual and the SBCL internals manual here, but that’s auto-built from the release process now.
• (outdated) The SBCL git repository
• (outdated) the SBCL arch archive: SBCL in arch