1)   JSudoku 1.3
Generates and solves sudoku puzzles of different difficulty levels. Hints (with possible candidates and showing deducible cells) can be activated if the user wants to. Load and Save of boards is supported. Very intuitive and easy to use GUI.
Sudoku, Puzzle creator, Puzzle Solver, Brain teaser,

 2)   Align It! 2.41
Try to survive as long as possible by aligning five or more balls of the same color into a vertical, horizontal or diagonal row. This highly addictive game is easy to learn, but hard to master. Plus - an optional Internet gaming mode is included.
game, shareware, lines, mind, puzzle, logic, board, free, download, solitaire,

 3)   Hyper 21 1.7
Imagine the fun and addictive gameplay of Tetris in a card game! Match up cards to make 21's before the dealer fills up the screen. The rules are very similar to Blackjack and equally simple. Be careful, once you start you may not be able to stop!.
Hyper 21, Puzzle, Tetris, tetrix, game, games, puzzles, black, jack, fun,

 4)   Path Of Least Resistance (POL-R) 1.02
POL-R (Path Of Least Resistanace) You must prevent as many drips from successfully completing their natural trip down the game board. You've got to think fast, predict where the drips will go and block them all as the game evolves.
Puzzle, casual game, brain teaser, brain-teaser, polr, pol-r, analytical, logic, strategy game, strategy,