drumbit - A very easy to use drum machine.
Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.
Sampulator - Make (and record) beats on your keyboard
keezy - A colorful soundboard. Play with music.
Onemotion Drum Machine - Drum Machine is a fully-featured web-based app developed by OneMotion to enable you to create Drum Beats and patterns.
Splice - Music creation, collaboration, and sharing made simple.