TED

TED or Tile EDitor was a level editing utility written for use in Gamer's Edge and later id Software projects, also being used by Apogee Software. According to Tom Hall, it was used in thirty four released projects, and thirty eight projects total. It was first used in Commander Keen and was last used for Rise of the Triad, with Hovertank 3D, Catacomb 3D and the Catacomb Adventure Series being produced with it in the intervening period.