Guild Wars 2 is a massively multiplayer online role-playing game developed by ArenaNet and published by NCsoft. The game was Buy to Play but it is now a Free to Play game. The game have 5 races and 8 classes with tons of PvE content and a PvP zone.
WildStar is a free to play, science fiction massively multiplayer online role-playing game that was launched in a subscription based model, and now its completely free. WildStar was developed by Carbine Studios and published by NCSOFT.
Trove is a massively multiplayer online role-playing sandbox game developed and published by Trion Worlds. In the same style as Minecraft, players can break down the world into resources and reuse these resources to build not only their own worlds and homes, but to craft gear.
Path of Exile is an Action RPG, free to play game, brought to us by Grinding Gear Games. It offers a style of gameplay made popular by the Diablo series of games, but with quite a few twist to make their take on the genre quite unique