Cryptograms
(23)
Mathematical
(15)
Nonograms
(6)
Optical Illusions
(27)
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Riddles
(30)
Sudoku
(78)
Gray Watson's Brain Teasers and Riddles
A collection of brain teasers and riddles with a guess button.
Able2Know
Message board of user submitted riddles and brain teasers.
BrainBall
A daily brain puzzle with 10 different tasks and a variety of statistics on your performance.
Brain Teasers
Brain teasers, riddles, logic puzzles and problems, paradoxes, optical illusions, IQ tests and logical games.
Confusion
It's a challenge to reach the end of this puzzle maze.
Eluzions
Featuring all sorts of games, optical illusions, puzzles, trivia, mazes, and magic tricks. Suitable for all ages.
The Amazing Art Site
Huge collection of optical illusions, hidden imagery, ambiguous art and upside downs.
The Logic Zone
Collection of problems with answers, logic puzzles and cryptograms.
Puzzles Without Rules
Free, updated, original abstract puzzles for advanced puzzle-solvers. Includes current unsolved puzzle and archive with hints and solutions.
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.
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.
All-Star Puzzles: Logic Problems
Collection of logic problems to solve. Printable.
Abnorm's Conundrums
Easy, medium and difficult brain teasers without answers.
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.
Planetarium
An on-line puzzle story in twelve weekly installments.
Bill's Brain Teasers
A collection of visual and linguistic riddles.
BrainBashers
Brain teasers, puzzles, riddles, games and optical illusions.
BrainBoggled.com
A collection of math, logic, and word puzzles.
Braingle - Brain Teasers & Riddles
Includes a huge collection of user submitted and rated brain teasers and riddles. It also has a lively message board and some unique multiplayer games.
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.
BrainVista
Collection of solved and unsolved brain teasers.
Puzzle Contest Center
Riddles, brainteasers, cryptograms, anagrams, and logic puzzles. Compete in eight new contests monthly.
Curiouser.co.uk
Paradoxes, puzzles, games, optical illusions, poetry, curious facts, and quotations.
Eyetricks: Brain Teasers
Weekly puzzles and archives.
Say What You See!
Collection of visual brain teasers which can be solved by saying what you see.
The Grey Labyrinth
A beautifully illustrated collection of puzzles, riddles, and paradoxes. Features a changing "unsolved puzzle" plus three years worth of previous puzzles.
Had To Play On
A community based site with competitions, challenges, awards, a help centre, forums and games.
Thinking Game Forums
Chat and discussion about online thinking 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.
PedagoNet Brainers
Over 60 brain teasers to enhance your mind.
Professor Tangent
Have fun with games, puzzles, brainteasers and humor as you learn about logic and analysis.
Puzzability
Some real mind benders here.
A Puzzlemakers Site
Puzzles of all descriptions.
National Puzzlers' League
Crosswords and other word puzzles and games, samples; monthly puzzle magazine; 800,000 word searchable list.
Pzzls
A collection of logic puzzles, riddles and brain teasers.
Sesquip Word Games
Challenging word games published in newspapers.
The Stone
an online mystery game. Hours of clever puzzles and riddles. Puzzles challenge the mind of serious and amateur players worldwide.
Thinks.com
Recreations for active minds including games, puzzles, math, words, images, books, software and web guide.
Word Juxtapoz
Word puzzles, riddles, rebuses, brain teasers, mazes, cliparts and pictures.
Zuzzle Puzzles
Collection of puzzles including riddles, logic puzzles and sequential puzzles.
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