Open source, pocket sized.

Wee Noise Makers is a French boutique outfit with a clear objection to entry-level instruments that lock you into one sound or one ecosystem. Their answer is a genuinely pocket-sized machine that does the whole job on its own: synthesis, sampling, sequencing and MIDI control of everything else on your desk.

The firmware is fully open source and hackable, and it keeps growing through free updates that add engines and features long after purchase. Small enough to carry, deep enough to finish a track.