EtcHash

From CryptoCurrency Wiki

EtcHash is the modified Dagger Hashimoto used by Ethereum Classic (ETC). It is comparable in it's behaviour to Ethereum Foundation's Ethash but allows for a long-term viability of GPU-mining with cards that have low memory (3gb, 4gb, 6gb) available.

Github: https://github.com/eth-classic/etchash