Thinks.com - Tower of Hanoi
- Includes graphical disks and pegs, drag and drop movement, instructions, timer and autosolver. Allows anything between 3 and 12 disks.
- http://thinks.com/java/hanoi/hanoi.htm

Mathnet : The Tower of Hanoi
- Graphical and text versions of this puzzle. Includes Background and solutions.
- http://www.math.toronto.edu/mathnet/games/towers.html