We have been working on "The Secret Chronicles of Dr. M" (TSC), an open source platformer that is a fork of Secret Maryo Chronicles (SMC), which was formerly a Mario clone. We've been moving away from Mario-isms and have been working toward a deeper story. We recently created a new release for the game.
The game currently uses a version of SDL from the 1.X series as well as legacy OpenGL. We are migrating both of these components to SFML.
If you have C++/SFML skills and would be interested in helping out with the project, we could certainly use the help. It is a big undertaking. Come join the fun and bring SFML to a new game fork!
The project website (with a forum) is:
http://www.secretchronicles.de/en/The branch in github for SFML development is:
https://github.com/Secretchronicles/TSC/tree/feature-sfml-portOur IRC channel is #secretchronicles on freenode.net
Screenshots: