http://sharedcoin.com/ is trustless centralized CoinJoin by Greg Maxwell.
Darksend in DarkCoin is dezentralized CoinCoin by Evan Duffield.

Haters/FUDers/trolls hate on DarkCoin saying it's insecure because bad actors like Goverments could run many Masternodes.


Leeds me to the question:

Is dezentralized trustless CoinJoin possible?