Anyone who has cool maze sources, post 'em. I will update this post until it becomes locked due to age, after which the updated list will appear at the end of this thread. This thread is open to anything mazelike, not just traditional 2D line mazes. Please chime in if you have any experience with anything here; items recommended multiple times will appear in bold, and some things may be posted even if they haven't been tried by the poster yet.

Where a pay-for resource appears with a link, it is for ease of getting a closer look; readers are encouraged to shop around. It's your money.

Books:

A Maze Adventure: Search for Pirate Treasure, by Graham White
Big Book of Adventure Mazes, by Dave Phillips
Big Book of Mazes, by Kim Blundell
Big Book of Mazes and Labyrinths, by Walter Shepherd (see warning elsewhere on Shepherd)
Challenging Mazes: 48 New and Unusual Puzzles, by Lee Daniel Quinn
Child's Play Mazes: Animal Adventure Mazes, by Lyn Martin
Dazzling Mazes: 50 Inventive Puzzles with Solutions, by Ulrich Koch
Maze: Solve the World's Most Challenging Puzzle, by Christopher Manson
Mazes and Labyrinths: A Book of Puzzles, by Walter Shepherd (WARNING: Note that one Amazon reviewer says this 1960's-era book includes the word "pickaninny")
Maze Craze: 46 Puzzles, by Albrecht Zipfel
Mazes, Mazes, Mazes, by Jody Taylor
Mind-Boggling Mazes, by Dave Phillips
Perplexing Mazes, by Lee Daniel Quinn
Secrets of the Pyramids: National Geographic Maze Adventures, by Graham White
Storming a Castle: National Geographic Maze Adventures, by Graham White

Games:

Amaze
Lab Mice
Labyrinth (by Ravensburger)
Maze Ways (Cat and Mouse, Mummy Mystery)
Quoridor

Toys:

Money Maze Bank
Perplexus

Computer games:

3D Logic

Online maze generators:

http://hereandabove.com/maze/mazeorig.form.html
http://www.worksheetworks.com/puzzles/math-maze.html
http://www.worksheetworks.com/puzzles/maze.html