Midihub is a stand-alone MIDI event processor, router & MIDI interface. Using the Midihub's Editor you can setup it to process MIDI messages in any way you want!
Pisound is an ultra-low latency high-quality sound card and MIDI interface specially designed for Raspberry Pi pocket computers.
A simple but really sturdy and beautiful case for your Pisound and Raspberry Pi.
Midiboy is an open-source DIY handheld microcomputer with MIDI support that comes in a form of a kit. Based on Arduino - one of the most popular maker platforms - Midiboy can run different MIDI programs or retro games called sketches.
Patchbox OS is a custom Linux distribution specially designed for Raspberry Pi based audio projects!