X11 is a mining algorithm which appeared in the mining community in 2014. The name originates from the fact that it takes 11 rounds of hashes to discover new blocks.
It is a relatively energy efficient way of mining, which at first allowed for both CPU and GPU to be used. When it first appeared, it enabled smaller miners to enter the race, preventing hard core ASICS hardware to take over.
However, X11 wasn’t ASICS resistant too long and when the DASH crypto-currency entered the scene, X11 was ASICSed.
Pioneer Coin (PCOIN)
Monkey Project (MONK)
Attention token of media (ATM)
I/O Coin (IOC)
Memetic / PepeCoin (MEME)