SRWare Iron, Torch Browser, Coolnovo (formerly ChromePlus), Comodo Dragon, etc.
Basically SRWare Iron is scam, Torch has modifications for torrents and multimedia, Comodo Dragon's focus is security and Coolnovo adds additional features. However if you're asking for a x64 Chrome build, currently doesn't exist. My best recommendation of the four is probably Coolnovo but it does have some bugs.