Brain Teaser Puzzles, Puzzle Magazines

Able2Know - Message board of user submited 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.
The Amazing Art Site - Huge collection of optical illusions, hidden imagery, ambiguous art and upside downs.
Analytical Puzzles - List of puzzles without solutions.
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.
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.
ButlerWeb - A page of about 30 brain teasers. Answers are hidden in drop down screens.
Chronigma - Weekly competition to solve original puzzles, riddles, and brain teasers in the least amount of time.
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.
Eli's Math and Logic Puzzles - Collection of math and logic puzzles.
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.
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.
The Game: What is The Meaning of Life? - Game with clues to answer the question.
Gamekeeper's MegaQuiz - Quiz, hangman, and images. Quizzes are downloadable and require Microsoft Excel on PC.
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.
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.
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.
The Logic Zone - Collection of problems with answers, logic puzzles and cryptograms.
National Puzzlers' League - Crosswords & other word puzzles and games, samples; monthly puzzle magazine; 800,000 word searchable list.
Nonogram Solver - Information about Nonogram logic puzzles and how to solve them, plus examples of two on-line solvers, software, and links.
Pastelina - Site containing a number of logic puzzle games created in Flash.
Peculiar - Brain teasers, problems, mathematical mind mazes, questions and optical illusions.
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.
Purple Hunt - A fun site for puzzles, free games, treasure hunts, cryptograms and intrigues. Prizes for winners.
Puzzability - Some real mind benders here
Puzzle Contest Center - Riddles, brainteasers, cryptograms, anagrams, and logic puzzles. Compete in eight new contests monthly.
The Puzzle Meisters - Features puzzles and mysterious enigmas along with a few trivia questions here and there.
A Puzzlemakers Site - Puzzles of all descriptions.
Puzzles on Seniority - Riddles, mind benders and puzzles for seniors (aged 50 or above).
Puzzles Without Rules - Free, updated, original abstract puzzles for advanced puzzle-solvesr. 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.
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 Stone - an online mystery game. Hours of clever puzzles and riddles. Puzzles challenge the mind of serious and amateur players worldwide.
Ten Teasers - Some of these brain-teasers need some thinking, others need no thinking at all.
Toon and a Mindtrap - Answer the daily brain teaser emails to become Mindtrapper of the month.
The Ultimate Thinking Puzzler - Discover who killed Ronald Opus in this contorted thinking puzzle.
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.
Wordles! - Get free cryptograms, create your own, and look up crossword puzzle words.
Zuzzle Puzzles - Collection of puzzles including riddles, logic puzzles and sequential puzzles.