new version of ccminer:

* small improvement over whirlcoin (increased the total number of threads): gpu usage is 99% for the gtx780ti (as well as the gtx750ti)
in terms of performance: I was getting before for gtx780ti+gtx750ti = around 19MH/s now I get 20.6MHash/s.

* added keccak256 (maxcoin) to ccminer
It isn't a port of cudaminer as it makes use of the main function of keccak512 instead of the one of cudaminer.

In terms of performance. cudaminer gives over my gtx780ti (OC) 293MHash/s, with this kernel I get around 300MHash/s
(I am not sure if the problem of low share getting registered  by pool is still present or not... I would assume yes).
Please watch the number of rejected shares. This one can be high (it is due to the use of a difficulty multiplier, and some tuning is still needed there)

The changes have been included into https://github.com/djm34/ccminer

It should compile on linux however it is untested.
I don't plan to release binaries.