Arianne is a multiplayer online engine to develop turn based and real time games. It provides a simple way of creating games using Python for a game's description. Marauroa, its server, uses Java, MySQL, UDP, and Python for hosting dozens of players.

Arianne is an online multiplayer open source framework for developing Internet games similar to Ultima Online or Everquest. It was created by Miguel Angel Blanch Lardin in 1999 with the assistance of developers around the world.