Links to interesting web sites e.g. those with interactive mazes, or the history or theory of mazes.
For websites refering to individual mazes please see the UK Mazes section.
Clickmazes has loads of mazes, many of them interactive.
Riccochet Robot is a puzzle game based on a maze, updated daily. (This site goes down from time to time, but is well worth checking out.)
Assuming I can argue for Pacman to be a maze based game, there's an online version at the Black Gang Chine site. (Uses Flash)