Cube world Alpha 2013 Free September
Cube World, developed by Picorama, is billed as a voxel-based, randomly generated, action-adventure RPG with borderless worlds and infinite character progression. It's not exactly an MMO, but it's pretty darn close: It also has a crafting system, PvP combat, and cooperative play via LAN or the web. If that sounds like something you would enjoy, you're in luck: Cube World's alpha phase has officially begun.
The Alpha is being sold for 20$ but are offering them for free!