http://clo.cionpool.com （ 

No registration required ； More profitable than ETH and ETC 

Callisto Network is developed by Ethereum Commonwealth, one of three ETC development teams.
 
Full example: ethminer -F http://clo.cionpool.com:8888/0xac1c6d615d40efc382595b9a941174cf89487c6d/myfarm -G --farm-recheck 200.