BrainJuice - An assortment puzzles that can be solved using mainly or wholly logic, presented with entertaining stories. The Brainteasers Network - Offers a never ending supply of brainteasers, puzzles and games that challenge the mind. These site contains the chaingame, this a set of riddles connected whit each other, without clearly stating which has to be solved first. 3D Riddle - Single image stereograms. 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 Grey Labyrinth - A beautifully illustrated collection of puzzles, riddles, and paradoxes. Features a changing unsolved puzzle plus three years worth of previous puzzles. Purple Hunt - A fun site for puzzles, free games, treasure hunts, cryptograms and intrigues. Prizes for winners. Riddles, brainteasers, cryptograms, anagrams, logic puzzles, crytparithms, and more.