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.
Squeak is an open, highly-portable Smalltalk-80 implementation providing platform-independent 2d and 3d graphics, sound, and network access. Active development of Squeak is going on elsewhere than SourceForge now, meet us at squeak.org.
A Set of work done by Giovanni Giorgi: BWolf, Squeak SmallTalk utilities, Java Novocaine prototyping engine
Pongo is a free MSN instant messenger client written in Smalltalk. It is cross platform, running on Windows, Mac, intel Linux and several other unix implementations.
Object-oriented scripting framework for interacting with objects using languages provided as plug-ins. Default language is Smalltalk. Main features: environments, actors, scripts, conversations, remote scripting.
ZATURN: Visual, Interactive, Intuitive, Emmersive User Experience with Mac OS X and Object Orientated Programming -- Think Tank and Sandbox