Real-time audio synthesis engine and music programming language
N.B. SuperCollider is now hosted at GitHub, and the most recent versions can be downloaded from there. http://supercollider.github.io A real time audio synthesis engine, and an object-oriented programming language specialised for music. SuperCollider was created in 1996 by James McCartney, now (since version 3) released as free software.
A Cocoa port of Emacs for MacOS X and GNUstep
Alpaca is a programmable rich-text editor for authors using Mac OS X. It is built on, and programmable in, Common Lisp, and has a complete Common Lisp programming environment built into it.
Computer Adventure Game Editor and Environment, multi-platform engine and development system for cinematic, image, and panoramic interfaces, to be extended to 3-D geometric, oblique/orthographic, plan, elevation, etc.
Small or experimental software projects developed by Nada Amin
Attempt of a portable cross-language object-oriented benchmark . So far supporting C++, Objective-C, and Java. Support for Smalltalk, CLOS, CSharp, and Eiffel is in development.