Cross Codes by Dan Stark and Helene Hovanec – Sudoku alternative
http://www.millionword.com/xcode2.php

The American Crossword Puzzle Tournament – The oldest and largest event of its kind. Organizer: Will Shortz; Coordinator: Helene Hovanec
http://www.crosswordtournament.com

Trick Me – Patrick Merrell's blog with puzzles, cartoons, books, and puzzle tidbits
http://trickme.wordpress.com

Triple Play Puzzles – Website for Trip Payne, Wordplay star and author of the acclaimed Crosswords For Kids series
http://www.tripleplaypuzzles.com

Cruciverb.Com – The community center for crossword constructors
http://www.cruciverb.com

The National Puzzlers' League – The world's oldest puzzlers' organization
http://www.puzzlers.org/

Puzzles.com – Puzzles and optical illusions, magic and origami, scientific toys and math diversions. Puzzles to play and to buy
http://www.puzzles.com

Conceptis puzzles – Number and picture logic puzzles
http://www.conceptispuzzles.com

The Crafty Puzzles Company – Wooden puzzles, brain teasers and 3D jigsaws. Unique designs, shipped internationally
http://www.craftypuzzles.com

WonderLetters – An innovative crossword game for children
http://www.wonderchess.com/product.htm

Heirloom Puzzles For Children – Handcrafted, educational wooden puzzles for children at affordable prices http://www.heirloompuzzlesforchildren.com

Peter Puzzle – Creative, innovative puzzles, activities, books, and more by Peter Grabarchuk, a leading puzzle designer
http://www.peterpuzzle.com

The Puzzles of Leonid Mochalov – Leonid Mochalov is an incredibly talented Russian puzzle creator. His puzzles are well known and popular in Russia and all over the World.
http://www.puzzlemochalovlp.com/

Casual Puzzles – Casual Puzzles has searched the web to find quality online puzzles and games that use logic, spatial awareness, pattern recognition etc. to provide entertaining games that challenge the brain. All of their content is free and ready to play.
http://www.casualpuzzles.com/

Crazy4Jigsaws.com – Hundreds of free online jigsaw puzzles for children and adults.
Crazy4Jigsaws.com

Puzzlr – Word Puzzles for you to solve
Puzzlr - Word Puzzles

Free online jigsaw puzzles – The place to play free online jigsaw puzzles
Free Online Jigsaw Puzzles

IQ Test – Have queries about IQ, IQ Tests, IQ Scores? Want to know if you are a Genius or what it takes to be a Genius? Get all your queries answered here on IQTestExperts.com.
www.iqtestexperts.com

Puzzle Master – Puzzle Master has a large and unique collection of brain teasers & puzzles for sale. In addition they also carry chess, mechanical banks, puzzle books, magic trick books, boomerangs, etc.
Puzzle Master