Luanti

Luanti, formerly known as Minetest, is an open-source voxel game engine and creation platform. It lets players explore a variety of games, from survival and building adventures to action, puzzles, and story-driven experiences, either solo or with friends. Players can join online servers, play locally, customize textures, and download games and other content directly through the client. The engine supports expansive worlds, multiple map generators, and versions for Windows, macOS, GNU/Linux, BSDs, and Android.

For creators, Luanti provides a Lua API for building complete voxel games and making mods without having to handle the underlying rendering or networking systems. Its ContentDB hosts thousands of open-source mods, along with games and texture packs that users can explore, adapt, or learn from. The project is developed transparently, with source code available and community support through forums and other channels. Luanti is suitable for both players seeking customizable multiplayer worlds and creators interested in developing or modifying voxel experiences.