Looks like one big list of fail...
Already been told NFS World is a really bad game.
Checked out COH Online and while it's in a web browser you still need the game files. So you need to download about 7GB of data just to play it. If you didn't own the game it might be interesting, otherwise just install and play what you have.
Everquest II is a joke if you don't have a subscription. The amount of limitations for a free account are horrible. http://everquest2.com/free_to_play/game_overview
Might check out BF Heroes yet but it probably isn't much fun either.