From the OctoJam page:
Chip8 is a language that let programmers write portable games for 8-bit home computers in the 1970s. Today, Chip8 lives on in the form of emulators.
Octo is a tool that makes it easy to write and share Chip8 programs. Roll up your sleeves and join us for a retro game-jam celebrating Chip8!And the gamejam rans through October. I love me a long-running gamejam, because I don't have time to devote an entire weekend to these things. What will you build using this (emulated) old hardware?