Splice Beat Maker - Make and share beats in your browser
Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.
Ramsophone - A generative art/music machine. (Be sure to refresh!)
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
Google Music Lab - Interactive experiments that use the Web Audio API
Splice - Music creation, collaboration, and sharing made simple.