Cusp
Cusp is an Eclipse IDE plugin that was available from http://bitfauna.com/projects/cusp/index.html and runs on top of SBCL. There are builds for Windows, Linux and OS X (Intel) available.

Cusp was written by Tim Jasko.

Project's site was http://cusp.devjavu.com/wiki.

Source was found at https://code.google.com/archive/p/cusp/

And there is a clone at github: https://github.com/budden/cusp

Article on CUSP at IBM Developer: https://www.ibm.com/developerworks/opensource/library/os-eclipse-lispcusp/index.html