Created by Guido Bertoni, Joan Daemen, Michael Peeters, and Gilles Van Assche, Keccak was a finalist in a cryptographic hash algorithm competition held on 2nd November 2007. The competition was run by National Institute of Standards and Technology (NIST) and ended on 2nd October 2012, when the winning algorithm was announced. This winning algorithm was Keccak and was the become the new standardized SHA-3. It is based on the cryptographic sponge principle, which it what makes it so effective.
Currently, we list 5 cryptocurrencies for the Keccak algorithm.