Heva Clonia Online is hoping to be seen as unique thanks to its pet system; it's just entered closed testing, so you can see for yourself how successful it's been at that goal.
There's no barrier to entering World of Warplanes at the moment, as it's in open beta, but its official release date has been moved ahead by a month and a half. Silent Hunter Online will provide lovers of military hardware another open-testing outlet for their enjoyment, although the game struggles a bit to really justify the "online" portion of its title.
Oh, and there's still a big old list of games just past the break for anyone interested in a title not mentioned here. If something in the list has sneaked in a cash shop, please let us know down in the comments.