PDa – Puredata anywhere 

http://gige.xdv.org/pda/

PDa is a clone of the computer music system Pure Data (Pd, for short) that runs on Personal Digital Assistants (PDA’s). Currently only PDA’s where you can install Linux are supported. Pure Data is a computer music language, that is widely used around the world and resembles MAX/MSP (another comercial computer music system). Pd is free software, and so is PDa. PDa has basically the same functionality as Pd. There are a few differences though.