In my search for new Nintendo DS homebrew music software I've found GlitchDS, it's a 32 step sequencer with a twist, the sequence is controlled by a "game of life" algorithm. You draw a seed pattern on the touch screen and it sets up a loop which evolves across the sequence, it controls up to 6 samples at a time. Program features include modulation control, distortion effect, load and save patterns and the ability to select different samples. This one is well worth a look for DS music makers.

GlitchDS Site - Link