SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
keezy - A colorful soundboard. Play with music.
Splice - Music creation, collaboration, and sharing made simple.
Aftertouch - Aftertouch – 3D MIDI Controller created and published by Kevin Nelson.
Splice Beat Maker - Make and share beats in your browser
GarageBand - GarageBand is a fully equipped music creation studio for Mac