Objective-CL
Objective-CL is a Common-Lisp/Objective-C bridge currently supporting a range of Lisp implementations on Mac OS X and GNUstep.

Volunteers welcome!

LGPL FFI Cocoa

ASDF-install package (obsolete) http://matthias.benkard.de/objective-cl/releases/objective-cl-0.2.2.tar.gz