Sony Online Entertainment (SOE) runs and publishes a number of free-to-play or subscription based MMO properties. They run the gamut from high-fantasy (Everquest) to first-person shooters (Planetside 2). At E3, SOE announced that they have another high-fantasy MMO on its way in Vanguard: Saga of Heroes.
The difference between, say Everquest and Vanguard, is that the former requires a subscription while the latter will be free-to-play with additional content for purchase as the series goes on. The above trailer says that Vanguard is coming soon but it’s actually available now and you can see it here.