CL-OBJC is a portable common-lisp/objective-c bridge written using CFFI. The aim is to be able to build Cocoa applications on Mac OS X by using InterfaceBuilder to design the GUI and then implement the code in common-lisp. (My attempt to revive this project)
Why do you think that https://github.com/fiddlerwoaroof/objc-lisp-bridge is a good alternative to cl-objc