| A Game A Day: A puzzle site featuring a new puzzle format each weekday for each month. Puzzles are fun, educational, entertaining and are also printable. |
| A Puzzlemakers Site: Puzzles of all descriptions. |
| Able2Know: Message board of user submitted riddles and brain teasers. |
| Abnorm's Conundrums: Easy, medium and difficult brain teasers without answers. |
| All-Star Puzzles: Logic Problems: Collection of logic problems to solve. Printable. |
| Alphabet Cartoon Puzzles: Letters of the alphabet are used as structural components for drawings of figures and faces. Spelling tips lead to the solution of the puzzles. |
| Analytical Puzzles: List of logic puzzles grouped by difficulty. |
| Archimedes' Laboratory: Recreational mathematics including puzzles to make and solve, tessellations, geometric puzzles, optical illusions, and curiosities. |
| AVAV: Collection of optical illusions, brain teasers and riddles. |
| Bill's Brain Teasers: A collection of visual and linguistic riddles. |
| Brain Juice: An assortment of entertaining logic puzzles with solutions and indicated levels of difficulties. |
| Brain Teaser World: Offers riddles, puzzles, optical illusions, and magic tricks. |
| Brain Teasers: Brain teasers, riddles, logic puzzles and problems, paradoxes, optical illusions, IQ tests and logical games. |
| BrainBall: A daily brain puzzle with 10 different tasks and a variety of statistics on your performance. |
| BrainBashers: Brain teasers, puzzles, riddles, games and optical illusions. |
| BrainBoggled.com: A collection of math, logic, and word puzzles. |
| Braingle - Brain Teasers & Riddles: Contains a huge collection of user submitted and rated brain teasers and riddles. It also has a lively message board and some unique multiplayer games. |
| BrainVista: Collection of solved and unsolved brain teasers. |
| Confusion: Its a challenge to reach the end of this puzzle maze. |
| Curiouser.co.uk: Paradoxes, puzzles, games, optical illusions, poetry, curious facts, and quotations. |
| Eluzions: Featuring all sorts of games, optical illusions, puzzles, trivia, mazes, and magic tricks. Suitable for all ages. |
| Eye-Pleasing, Mind-Teasing 3-D Conundrums: Scans from a book of puzzles, includes English translations. |
| Eyetricks: Brain Teasers: Weekly puzzles and archives. |
| Game-Master's Page: Riddles, games, cryprograms, math puzzles, and forums. |
| Gray Watson's Brain Teasers and Riddles: A collection of brain teasers and riddles with a guess button. |
| Had To Play On: A community based site with competitions, challenges, awards, a help centre, forums and games. |
| iRIDDLER: Challenge your mind with free online riddles/puzzles, logic games, brain teasers and view optical illusions. |
| Just Riddles and More: Riddles, illusions, puzzles, and brain teasers. |
| Logic Puzzles Escapades: Logic puzzles with a satirical New Zealand tone. |
| National Puzzlers' League: Crosswords & other word puzzles and games, samples; monthly puzzle magazine; 800,000 word searchable list. |
| PedagoNet Brainers: Over 60 brain teasers to enhance your mind. |
| Planetarium: An on-line puzzle story in twelve weekly installments. |
| Professor Tangent: Have fun with games, puzzles, brainteasers and humor as you learn about logic and analysis. |
| Puzzability: Some real mind benders here. |
| Puzzle Contest Center: Riddles, brainteasers, cryptograms, anagrams, and logic puzzles. Compete in eight new contests monthly. |
| Puzzles Without Rules: Free, updated, original abstract puzzles for advanced puzzle-solvesr. Includes current unsolved puzzle and archive with hints and solutions. |
| Pzzls: A collection of logic puzzles, riddles and brain teasers. |
| Rec.puzzles Archive: An archive of many popular puzzles from the rec.puzzles newsgroup. |
| Roh'El's Riddles: Offers brainteasers rated by difficulty and category. |
| Say What You See!: Collection of visual brain teasers which can be solved by saying what you see. |
| Sesquip Word Games: Challenging word games published in newspapers. |
| Shashi's Homepage: Collection of puzzles, riddles and brain teasers. |
| The Amazing Art Site: Huge collection of optical illusions, hidden imagery, ambiguous art and upside downs. |
| The Grey Labyrinth: A beautifully illustrated collection of puzzles, riddles, and paradoxes. Features a changing "unsolved puzzle" plus three years worth of previous puzzles. |
| The Logic Zone: Collection of problems with answers, logic puzzles and cryptograms. |
| The Stone: an online mystery game. Hours of clever puzzles and riddles. Puzzles challenge the mind of serious and amateur players worldwide. |
| Thinking Game Forums: Chat and discussion about online thinking games. |
| Unitix Entertainment: Online games, puzzles and other interactive brainteasers. Fun for all ages. |
| Word Juxtapoz: Word puzzles, riddles, rebuses, brain teasers, mazes, cliparts and pictures. |
| Zuzzle Puzzles: Collection of puzzles including riddles, logic puzzles and sequential puzzles. |
Classical
