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Open Directory ProjectThe Open Directory Project is the largest, most comprehensive human-edited directory of the Web. It is constructed and maintained by a vast, global community of volunteer editors.
Peter PuzzlePuzzle projects by Peter Grabarchuk, including puzzle products, books and publications, web puzzles and other puzzle activities.
Puzzles.comFrom Tricky and Clever Puzzles through Baffling and Perplexing Illusions to Cognitive Toys.
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