Tetris clones are a dime a dozen, but S-TRIS 2 is unique in two ways. One, it's free, and two, it's damn good. I found and tested it on my Pocket PC, but it turns out that S-TRIS 2 is available for a number of platforms, including Win32 (Windows), GP2X, Pocket PC, Smartphone, and Symbian. How cool is that? In terms of game play value, S-TRIS 2 is right up there. The visuals are clean, quick and smooth, the sound effects are solid, and the controls feel responsive. It's a simple matter to remap the controls if you prefer a different layout - for example, I like to have the "fast drop" button be the center button on my keypad, and it took me all of about 15 seconds to make that happen. The game gracefully pauses if you have to turn the power off on your device, and starts up and shuts down relatively quickly.
S-TRIS 2 is definitely a keeper on my Pocket PC.
