Put together the Boston University logo (Java).

Challenging online puzzle game on a checkerboard.

Collection of online sliding puzzles featuring popular subjects including 'N Sync, Dragonball, Britney Spears, and Pokemon.

A sliding box puzzle game with hundreds of challenging computer-generated levels.

Hexagonal variation on sliding tile puzzles. There must be two adjacent open spots to move a hexagon.

Line drawings make these puzzles quite fiendish. You can reach the Hall of Fame if you're good enough.

Double sided sliding puzzle. You cannot slide individual squares. Instead, you move squares by sliding rows and columns of squares at the same time.

Celebrity online sliding puzzles offered at four difficulty levels.

Offers photos and a Java applet to play rare and collectable sliding block puzzle designs online.

Online slide puzzle which has no empty space. Instead, the pieces wrap around when the entire row or column is moved. Also available for download and placement on web pages.

Online mixup puzzle game in which the object is to slide the pieces of each image to form a complete picture in the least amount of moves. Also offers a free downloadable screensaver.

Different sizes of pieces make these puzzles much more difficult than regular sliding puzzles.