LTris is just another tetris clone but imho a good one. So if you like tetris,
download and play it!

Features: 

     Tetris clone using SDL 
     Sound 
     Menu 
     Controls can be redefined 
     Block preview 
     Starting level between 0 and 9 
     Various backgrounds 
     HighScores 
     Nice graphics 
     Smooth gameplay 
     Cool effects (transparency, animations) 
     Two player mode 
     Two game modes 

Two game modes? Yes. The first one called "normal" is the mode everbody knows
well. You play as long as you can while the blocks are getting faster. The
second one called "advanced" has got some additional features. First there is
a new figure in each new level and second later on there are suddenly appearing
tiles and rows.

WWW: http://lgames.sourceforge.net/#ltris