Avant garde music mag The Wire posted a fascinating compilation of computer music pieces, each programed with a Tweet-length piece of code. The 22 artists from around the world wrote their pieces in SuperCollider, an open source programming language for audio synthesis that many laptop musicians use to compose live during performances. The compilation is titled "Supercollider 140" and is released under a Creative Commons license. From The Wire:
It started as a curious project, when live coding enthusiast and Toplap member Dan Stowell started tweeting tiny snippets of musical code using SuperCollider. Pleasantly surprised by the reaction, and "not wanting this stuff to vanish into the ether" he has recently collated the best pieces into a special download for The Wire's online readership...SuperCollider 140 (SourceForge, via @chris_carter_)
Many of these pieces are actually generative, so if you re-run the source code (the track titles) you get a new piece of music.
"Best of Twitter tunes album released" (New Scientist)