The Mana World (TMW) is a serious effort to create an innovative free and open source MMORPG.
TMW uses 2D graphics and aims to create a large and diverse interactive world. It is licensed under the GPL, making sure this game can’t ever run away from you. The project includes the development of both a client and a server, as well as the development of an online world.
Nightly builds service is under maintenance, hopefully it will be back soon