Originally released as an entry level Mac application, the djay's iPad algoriddim reincarnation has taken on a new life. Right now, it is still a long way behind more established programs on the App Store, but djay nevertheless has a few bunnies in the top hat.
Notably, it boasts the ability to connect varioushardware DJ controllers for a more traditional mixing experience. The app needs the iOS 4.3 or later.
Platform: iPad
Price: £13.99/US$19.99 (around AU$21)