Kuler
A couple of days ago Adobe made available Kuler.
kuler is the first creative, hosted web application from Adobe Labs designed both to stand alone and to complement Adobe® Creative Suite® 2 components.
Annoyingly Kuler is what I hoped my ColorToy might have grown into if I’d actually got around to working on it. It’s very impressive and you should go check it out. One thing though where ColorToy still has an edge is in having random color functionality. Sometimes color inspiration can evade you but you can’t beat hammering random until something magical turns up.
So in summery, Kuler is awesome but ColorToy still has that random edge.