AMTEMU (Artemis Mud Tools and Emulator) is an open-source MUD (Multi-User Dungeon) game engine and emulator. It's designed to help developers create and manage their own MUD games, which are text-based online multiplayer games.

The AMTEMU project is hosted on GitHub, where you can find the full source code, documentation, and issue tracker. The repository is publicly available at https://github.com/amtemu/amtemu .