Tetris
It is not as original as TeenTris but it's free with nice graphics and sounds. It is relatively small - less then 100K after installation.
Snake Tetris
Snake game and Tetris game combine to form this brand new game! Come and challenge yourself with this new tetris game! Also included are snake game and tetris game, so you get 3 games from 1 download!
ShapeManiac
How can a puzzle made out of just a few shapes be anything but easy to solve? Okay, smarty pants. How about you put your brain where your mouth is and prove that you can master each of the 130 progressively more challenging puzzles in ShapeManiac.
Trilix
The idea of the game is to spot groups of three or more touching tiles of the same colour, as the pile gets bigger and bigger. Skill and precision are needed as the game slowly increases in speed. Lots of frantic action and fun, with great graphics.
Warehouse: Game of Wit and Logic
Warehouse - A clever thinking game! Reach the exit by toppling boxes in a warehouse.