drumbit - A very easy to use drum machine.
Musicca Online drum machine - Musicca provides a fully-featured Online drum machine that enables you to create unique rhythms.
Type Drummer - Drum by typing
Remixlive - Remixer, beat maker and finger drumming instrument for iOS.
Sampulator - Make (and record) beats on your keyboard
MixPads 2 - MixPads 2 is an elegant mobile app that works as a music creator and helps you to access musical communities on social platforms.