Ramsophone - A generative art/music machine. (Be sure to refresh!)
keezy - A colorful soundboard. Play with music.
Tinkersynth - Create and purchase unique generative art
Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.
Generative Art in Go - Learn the basics of algorithmic art with the Go language
Splice - Music creation, collaboration, and sharing made simple.