which coins use this algorithm? i see they call it "marucoin" algorithm in sph-sgminer, but is marucoin the first coin to use it or only the most famous coin?
Yep it's marucoin. it's the same as X11 it just has 2 additional sph algos (hamsi and fugue). By the way, once you earn enough from the donations (which I have nothing against), consider contributing some of your improvements to sgminer (
https://github.com/sgminer-dev/sgminer/tree/v5_0). Since it would not be possible to do this without sgminer (or cgminer in the first place), it is nice to give something back from time to time. Cheers!
I have no real improvements on the C code from sgminer, all improvements are on the opencl code, which is already free and can be integrated into the original code whenever the author wants. It is not up to me to decide what get's merged back into his code.