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.
Clear
Game of an average level of complexity. The objective of the game is the clearing of a field of multi-coloured blocks, placed on it. The clearing is carried out by turn of four blocks, selected by a framework.
Frozen Fruits 2
Frozen Fruits 1 is one the most original free games available on the net. Here comes the 2nd part with 35 new levels which were created by fans of the game.
Cargo Track 3
Cargo Track[TM] 3 is a enhanced variant of the classic Japanese puzzle Sokoban.
Touch Puf
A unique puzzle game that has 150 levels. The goal is to destroy all color blocks in all levels of the game by making similar colored blocks touch each other. The levels start very easy and slowley goes harder. There is also a level editor.
Flying Pigs
This is a simple arcade-style game in which the aim is to catch flying pigs as they parachute down your screen. The pigs come in several different varieties, including bonus pigs, diseased pigs, space pigs, invisible pigs, and exploding pigs!