Triqtraq is a new electronic music/DJ app and “jam sequencer” that looks quite interesting. The application appears to be robust with parameters like pitch, filter, delay, decay and level, storage for up to 16 patterns and 32 samples, and a 350+ samples library. Following my experience with Figure, I think this app may be worth its very reasonable price. Triqtraq was developed by music composer/sound designer, Sebastian Schatz.
You can purchase Triqtraq through iTunes.