plus4chan is an imageboard started circa 2006, as a place for /co/ to post whenever 4chan was down, and to give its users additional boards and functions that 4chan did not or could not give at the time. Although these additions may not be unique anymore, plus4chan is still around thanks to its own, ever loyal community.
by Mister Twister
>>417904 When +4chan was about to die (FOR REAL THIS TIME!!!!), I made a 8chan backup. A month or so later, an unexpected helper showed up, promising to help the +4 owner...