In the 1990’s, I was the lead developer for a fairly large Lisp project, a simulation environment for animal behavior and habitat usage. I had a great time on that project, and I still miss working in Lisp (although Cocoa is almost as fun and almost as productive).
I was very happy to see this new survey of active Common Lisp implementations by Daniel Weinreb. It’s nice to see that good old Franz is still around, and I may yet get that old animal simulation code running under Mac OS X with Clozure’s OpenMCL.
Hal Mueller's Blog 