32blit: our retro-inspired handheld with open-source firmware. Go back, way back, to the start, with a single hardware platform and a great set of game creation tools.

Feather in Breakouts, Boards & Electronics

Breakouts add handy functions to your microcontroller, be it a Raspberry Pi, Arduino, or something else. They tend to be dedicated to just one or a couple of functions, like audio output, motor driving, or sensors, but can be built up into larger projects.