GlitchDS is a free cellular automaton music sequencer for the Nintendo DS that could be great for creating IDM and Glitch style loops.

Features include:

• Customizable Cellular Automaton sequencer
• Create your own “trigger points”
• Load in your own sounds
• Save and load your work
• BPM settings, or “strum mode” for controlling tempo
• Up to 6 sounds can be loaded at once
• Each sound has its own 32 step frequency modulation sequencer
• Global Distortion setting