C11 uses an algorithm similar to X11 with 11 hashes, but in a different order. This is purely coincidence, I already had the client developed a couple of days ago. Darkcoin uses the Litecoin base afaik and ChainCoin uses a Bitcoin base and includes transaction messages.

#include “uint256.h”
#include “sph_blake.h”
#include “sph_bmw.h”
#include “sph_groestl.h”
#include “sph_jh.h”
#include “sph_keccak.h”
#include “sph_skein.h”
#include “sph_cubehash.h”
#include “sph_echo.h”
#include “sph_luffa.h”
#include “sph_shavite.h”
#include “sph_simd.h”