Braingle - Brain Teasers & Riddles (Popularity: )

Contains a huge collection of user submitted and rated brain teasers and riddles. It also has a lively message board and some unique multiplayer games.
Category: Games\Puzzles\Brain Teasers

Puzzle Contest Center (Popularity: )

Riddles, brainteasers, cryptograms, anagrams, and logic puzzles. Compete in eight new contests monthly.
Category: Games\Puzzles\Brain Teasers

The Contest Center (Popularity: )

Eight new puzzle contests monthly. Plus riddles, brainteasers, cryptograms, logic puzzles, crosswords, anagrams, alphametics, sweepstakes, and tongue twisters.
Category: Games\Puzzles\Crosswords\Contests

Verbalobe (Popularity: )

Community site for enthusiasts. Contain articles, downloads, dream plays, forums, a FAQ, and other game help.
Category: Games\Board Games\Words and Trivia\Scrabble