Minetest is a free and open source for voxel game for Windows, macOS, Linux, BSD and Android. This game is heavily inspired by popular game from microsoft minecraft. This is one of the best alternative for minecraft. It comes with full game engine and using this you can create your own voxel games and mods. It comes with Multiplayer Support, Texture Packs, Beautiful Map Generators, Mods support and 62,000 × 62,000 × 62,000 blocks. It is released under GNU Lesser General Public License version 2.1+ License.