Minetest - Minetest is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner...
Roblox - Reimagining the way people come together.
Lamecraft - Minecraft clone for Playstation Portable (PSP)
VOXELCANVAS - Free online voxel creation platform
The Blockheads - Night is falling and your blockhead is freezing.
Kaedim - Use the Kaedim Platform to automatically transform your 2D art, sketches and photos in 3D.