A Puzzlemakers Site
Puzzles of all descriptions.
www.puzzlemakers.net Details

AVAV
Collection of optical illusions, brain teasers and riddles.
www.kuponh.karoo.net Details

Able2Know
Message board of user submitted riddles and brain teasers.
able2know.com Details

All-Star Puzzles: Logic Problems
Collection of logic problems to solve. Printable.
www.allstarpuzzles.com Details

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.
home.ca.inter.net Details

Analytical Puzzles
List of logic puzzles grouped by difficulty.
www.nickvautier.com Details

Archimedes' Laboratory
Recreational mathematics including puzzles to make and solve, tessellations, geometric puzzles, optical illusions, and curiosities.
www.archimedes-lab.org Details

Bill's Brain Teasers
A collection of visual and linguistic riddles.
www.billsgames.com Details

Brain Juice
An assortment of entertaining logic puzzles with solutions and indicated levels of difficulties.
www.brainj.net Details