- De Ultieme Puzzel en Raadsel Site: Dutch version of the best puzzle pages on the web.
- The Puzzle House: Upscale, high quality, hard to find jigsaw puzzles.
- Livewire Puzzles: Wire disentanglement puzzles.
- Peter Puzzle: Peter Grabarchuk's puzzle design projects, including puzzle products, publications, web puzzles, and other puzzle activities.
- Web Games City: 700+ free online games and puzzles playable over the web in your browser.
- Online Games and Services: such as Rubik's Clocks.
- Beyond... The Black Stump: Conundrums and Box Puzzles, many references!