The T-REX multi-miner for Nvidia last week released two updates 0.8.3 and 0.8.4 in which the X22s mining algorithm was added for mining Ritocoin cryptocurrency, the latest version also increased the hashrate for the already popular X22i algorithm by 1-4%. As before, T-REX is distributed as a miner with closed source code and a built-in developer commission of 1%. You can download T-Rex multiminer for Windows and Linux on the Bitcointalkforum.