AudioTool - Whether you want to make music for the club, or you're aiming to put a few tracks to a film, Audiotool is a website geared towards putting the mixes at your fingertips. Read more about AudioTool.
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
Ohm Studio - Ohm Studio is the first real-time collaborative digital audio workstation.
keezy - A colorful soundboard. Play with music.
FL Studio - Image-Line's FL Studio, now on it's 12th version, is a well-known music production suite and the most popular beat processor on the market, due no doubt to its longevity. Read more about FL Studio.
G-Stomper Studio - G-Stomper Studio is a feature-packed, mobile music production tool.