Below is a list of sites dedicated to puzzles and games of various types. If you know of a site that should be added to this list, tell us about it!

• Noggintwisters
• Puzzle PLAYGROUND
• Puzzle Parlor
• John Conway's Game of Life - a site with a Life applet and other resources for the Life enthusiast.
• Mathpuzzle.com - various math related puzzles, some with cash awards for solution or problem proposals. Several of these are good starting points for math projects.
• Rubik's Online - Play all sorts of puzzles from Rubik, including the classic Cube.
• Aha Puzzles! - Creative puzzles by Lloyd King.
• Brain Teasers by Barry R. Clarke - Numerous brain teasers and other puzzles.
• Boxerjam - Game shows, word games, and puzzles.
• Ring of Puzzle sites - A collection of engaging puzzle sites.
• Sliding Block Puzzle Page
• The Diamond 16 Puzzle
• Combinatorial Games - all sorts of two-player games of perfect knowledge such as go or chess.
• Thinker Puzzles by David Leithauser
• Puzzles with polyhedra and numbers by Jorge Rezende
• Nick's Mathematical Puzzles The puzzles range over geometry, probability, number theory, algebra, calculus, and logic