Games » Puzzles
Puzzle Monster - http://www.puzzlemonster.com/
A free website devoted to bringing you a variety of free online puzzles.
Logicville - http://www.logicville.com/
A website collection of mathematical games, puzzles, and brain teasers, including anagrams, cryptograms, cryptarithms or alphametics, word puzzles, logic games, doublets, tangrams, sudoku, chess problems, and many educational and math problems.