Gibson's legendary Maestro FZ-1 Fuzz-Tone is the one. Without this there may well be no effects pedals at all, they should have called it the big bang! Released in 1962 it was the first widely marketed fuzz distortion guitar and bass effect. But then a small band named The Rolling Stones ended up with one and Keith Richards decided to use it to simulate the brass section guide track on a new song they were creating. Never intending to release the song with the fuzz on the record the band took the brave move of putting the track out.
It's even reported that Keith didn't want the fuzz on the track “At first I was mortified,” Richards says, “We didn’t even know Andrew [Loog Oldham, the Stones’ manager] had put the ******* thing out! [But it was] the record of the summer of ’65, so I’m not arguing.” BUT we're all massively thankful it was released since now we have millions of these wonderful toys which have made playing guitar and music in general so much fun for all.