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Online Brain Games & Optical Illusions
SharpBrains is the leading market research and advisory services firm covering the growing cognitive fitness market. The firm released its flagship The State of the Brain Fitness Software Market 2008 report earlier this year.
User submitted and ranked brain teasers, riddles, quizzes, trivia, logic problems and mind puzzles. Free online games and message boards.
Fit Brains is a fun, brain fitness program. Online brain games and exercises to help keep your mind sharp-Play memory, concentration, language and logic brain games."/