AI Maze Generator builds unique mazes that you can play in the browser or print. You can pick square, hexagonal, circular or triangle layouts and set custom sizes from small to very large grids.
There are several game modes, including a 30-level campaign, a daily challenge shared by all players, a timed race and a memory-based fog mode. Mazes can be downloaded as PDF worksheets, which makes it handy for classrooms and kids' activity time. It is completely free.