- Alien Tiles
 - Fun and fiendishly difficult colour patterns puzzle. - All-Star Puzzles
- Puzzles include word searches, logic problems, crostics, picture puzzles, cryptograms, and more.
- Archimedes' Laboratory
- Mechanical puzzles, optical illusions, mazes, tessellations, and paradoxical games.
- BrainBashers
- Puzzles, brain teasers, games, and optical illusions for the whole family.
- Cartoon Critters
- Offering colouring pages, learn to draw tools, games, jigsaw puzzles, mazes, jokes, and more.
- Confusion
- Online puzzle challenge. Can you solve it?
- CrossPix
- Paint by numbers puzzle game that runs in a browser.
- curiouser.co.uk
- Offers paradoxical designs, puzzles, poems, and ideas.
- FigurePic
- Tangrams, logic and paint by numbers games in Java.
- Hive-Mind Mind Games
- Puzzling psychological diversions and brain teasers.
- iRiddler
- Includes word and math puzzles, riddles, logic games, and optical illusions.
- K-Ball
- 3D spherical, logical puzzle playable online in 8, 26, and 32 segment versions.
- Kid Crosswords and Other Puzzles
- Monthly e-zine of puzzles on educational topics for teachers and parents to use with their kids.
- Kids' Corner
- Kids' art gallery, puzzles, message boards, and links to web sites for kids.
- Logic Problems Page
- Solve the puzzles by deducing information from the clues.
- Logicville
- Promoting puzzles, brain teasers, mathematical recreations, and word games.
- Magic Seal Puzzle Games
- Downloadable puzzles include slider games, memory puzzles, and tile games.
- Mystery of Time and Space
- Interactive online adventure game featuring logic puzzles. From Logan Interactive.
- Planarity
- Try to arrange the vertices so none of the lines intersect.
- Plastelina
- Contains a number of classic logic puzzle games created in Flash.
- Pogo: Puzzle Games
- Play Poppit, Sweet Tooth 2, Sudoku, Mah Jong, and other free puzzle games online.
- Puzzability Puzzles
- Puzzles, games, and teasers by a team of puzzling experts.
- Puzzle Choice
- Printable and interactive crosswords plus wordsearches, quizzes, number puzzles, cryptograms, anagrams, and more.
- Puzzle Depot
- Features online crossword games, riddles and word puzzles, logic puzzles, and puzzle software.
- Puzzle Maker
- Offers an instant online crossword and word search puzzle making tool.
- Puzzle Webring
- Ring of sites about puzzles.
- Puzzle-Games.org
- Outlines a variety of online puzzle games.
- PuzzleFactory.com
- Online interactive jigsaw puzzles, memory games, word games, and more.
- Puzzlenut.com
- Crosswords, education puzzles, daily brain teasers, and more.
- Puzzles.com
- Play online puzzles or download logic problems, illusions, tricks, riddles, and math puzzles. Also includes a section for educational puzzles, online clubs, hints, and more.
- Puzzling Things
- Directory of sites about puzzles and games.
- Razzle
- Offers free online and printable puzzles, including crosswords, cryptograms, jumble word games, hangman, online maze, Sudoku, wordsearch, ghost word game, and more.
- rec.puzzles Archive, The
- List of puzzles, categorized by subject area. Each puzzle includes a solution.
- Sequence Puzzles
- Find the pattern in a series of letters or digits.
- Shufflebrain
- A selection of web games by Scott Kim.
- Sports and Sports Figures in Crosswords
- Explanations of popular crossword clues.
- Stackopolis
- Official site for the puzzle game Stackopolis. Players are given a blueprint and must move blocks in order to recreate the pattern.
- Thinks.com
- Challenging puzzles and games including jigsaw puzzles, crosswords, word searches, and trivia.
- Troyis
- Addictive puzzle game based on the the chess knight movement.
- Ultimate Puzzle Site, The
- Collection of puzzles, riddles, quizzes, and brainteasers.
- Very Difficult Puzzles
- Features a collection of puzzles to test the best, including the multi-language crossword, with clues and solutions.
- Wooly Thinking
- Games for brains.
- World Puzzle Federation
- International organization that brings together puzzlers from around the world for the annual World Puzzle Championship.
- World Puzzle Federation: Team USA
- Includes information on the U.S. Puzzle Championship and history of the World Puzzle Championship, news, registration, and more.
- Zen
- Can you create symmetrical beauty using Zen? Now that's the trick.
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