- Puzzle Publishers
- Dell MAGAZINES(USA)
- Puzzles
- Ratsel, Puzzle und anderer Denksport(German)
- The Sliding Block Puzzle Page by Nick Baxter
- "Cross Sums" by X-Sums 98!
- Links
- INTERNET GAMES .... Puzzle Links
- 1st SPOT Crossword Puzzle Games
- RECREATIONAL MATH
- Mechanical Puzzle Links
- The burr puzzles site .... IBM
- Sites et References(French)