Roblox - Reimagining the way people come together.
Blockade 3D - Use guns, tanks, and even shovels to kill your enemy in different game-modes.
Lunacraft - Lunacraft focuses on Endless Creativity and Exploration elements.
OpenSpades - OpenSpades is an open source OpenGL-based alternative game client by yvt that can be used to play...
Blockland - Blockland is a non-competitive multiplayer sandbox-style construction game. It's kind of like playing with legos on the internet.
Cube World - I'm Wollay, the creator of Cube World.