FilePlanet has put up a page linking to all the MMORPG free trials or free games which you can download from them. That includes free trials for World of Warcraft, Everquest 2, and Dungeons & Dragons Online, and other major games in the genre. There are also a few less good games, but maybe some people like these generic Asian killstealing games. In any case, all of these games are free to try, and some are even free to play in the basic version, like Anarchy Online. Check it out!