The official Ken's Labyrinth page:By the original developer, who has released the game as freeware. Ports of the game, screen shots, cheat codes, maps, and background.
LAB3D/SDL: Port of the game for Windows and Linux using OpenGL.
MobyGames: Review, ratings, credits, screen shots, and trivia.
Video Game Tips: Cheat codes.
Wikipedia: Encyclopedia article describing the game.