Nothing sounds quite like an 808, but nothing sounds quite like a 303 either. Roland TB-303 created the sound that became the foundation for acid house, which became the one of the pillars for electronic music in the 90s, which turned into a thing called EDM. But don’t blame the 303 for that.
Lest you think we at Adafruit don’t know our sequencer from our pot knob, recall that Ladyada’s legendary x0xb0x is a full reproduction of the original Roland 303 that can be programmed just like the original.
And here’s a documentary on the TB-303, just in case you need one: