PlaneShift is a Role Playing Game immersed into a 3D virtual fantasy world which is fully free to play. (GPL)
Linux - FreeBSD - Windows - MAC OS X
Veloren is a multiplayer voxel RPG written in Rust. It is inspired by games such as Cube World, Legend of Zelda: Breath of the Wild, Dwarf Fortress and Minecraft (GPL)
Linux - Windows - MAC OS X
The WorldForge project is producing an open source framework for massively multiplayer online role-playing games. (GPL)
Cross-platform
3 applications