Tetris Adventure
The best Tetris clone ever. Exciting power ups, latest music, level editor.
Size: 5.7MB 
OS: Win 9x/ME/2K/NT/XP

Advanced Tetric
Reworking of the classic Tetris game with some extra features.
Size: 1.8MB 
OS: Win 9x/ME/NT/2K/XP/2K3

Tetris Lives
Fully skinnable tetris game.
Size: 591KB
OS: Win ME/2K/XP

Stacker Blocks 3D
Classic Tetris with Direct3D graphics.
Size: 201KB
OS: Win 9x/ME/2K/XP

ColorTetris
A little more than just Tetris. It also includes Pentix, and more.
Size: 853KB
OS: Win 9x/ME/NT/2K/XP/2K3