Sporktris is a clone of Tetris-clones. It doesn't add anything new to the gameplay, it simply tries to do all the important things well.
Sporktris is written in C, using SDL for graphics and input (for easy portability). It requires SDL, SDL_image and SDL_ttf to build.
Sporktris is Free Software released under the GPL. Donations are totally unexpected, but greatly appreciated.
Pretty level backgrounds, and coloured pieces to go with them
Cross-platform (works on at least Mac OS X, Windows and Linux)
Its own key repeat system (allows for holding down two keys at once, among other things)
Automatically pauses when it loses focus
Will not cause a raccoon infestation in your home or work place
Handy Features list