alt Hacker NewsChip8 is the rite of passage for many emulator devs due to its simplicity, it can be implemented on virtually every 1 cent microcontroller out there.
It should've had a more dedicated vibrant community if it weren't the many incompabilities among the different emulators implementations out there, all due to people using cowgod's chip-8 tecnical reference as the single source of truth[0], which itself is based on David Winter's original implementation which contained a few inaccuracies on some instructions behavior from the original COSMAC VIP interpreter.
It's rather disheartening to see new chip8-related projects which reference Octo, modern test ROMs written with Octo, and still see a citation for cowgod's egregiously incomplete and misleading documentation.