Equinoxe is a level rendering, level creation, face animation tool and a game engine by Equinoxe Digital Entertainment. It was first used in Geo Adventure: Gree Guy's Returns by Traveller's Tales, but originally in The Legend of Zelda: The Wind Waker by Nintendo. The products previously developed by Equinoxe Digital Entertainment was used commonly in SnakeCore's, UltraNitro Studios's and Nuclear Monkey Software's video games. The products include Abstegro physics engine, and previously Tatsu lighting tool and kAI and mAI artificial intelligence engines.