Hi there. I'm working on a free game in my spare time. It's about motorcycle racing. The "engine" (if such thing exists in its code) is based on SFML. Its written in C++, and artwork is made with Inkscape and The GIMP.
Basically it's a top viewed 2D racing game, where you ride a motorbike and you win races or championships to earn experience to improve your bike and unlock hidden features (the last point is not developed yet).
There is a beta version with many features already available. You can find more info, download the game, or watch a demo video in its homepage:
http://motogt.sourceforge.netIt's my first SFML game (in fact, my first public game), and I'm really happy with this amazing lib. It made me forget about graphics and sound and let me concentrate on the game logic. I've found a few problems in the way, but we can blame the lack of experience with it ;).
Congrats to SFML developers and keep it going on that way.