Mixxx - The most powerful free DJ software in the world.
drumbit - A very easy to use drum machine.
Serato DJ - Serato DJ is award winning, digital DJing software used by professionals across the globe.
Remixlive - Remixer, beat maker and finger drumming instrument for iOS.
Djay - djay gives you instant access to all your existing tracks and playlists from iTunes.
Onemotion Drum Machine - Drum Machine is a fully-featured web-based app developed by OneMotion to enable you to create Drum Beats and patterns.