PixelLight is an open-source, cross-platform 3D application framework written in C++. It currently supports Windows and Linux, and a mobile port for Maemo 5 is on the way. PixelLight has a highly plugin driven architecture with plugins for many third-party middleware such as sound and physics engines, input devices etc. It has a modern deferred shader renderer and currently supports both OpenGL and OpenGL ES 2.0.
On http://www.pixellight.org/ you'll find some videos, downloadable demos, an SDK for Windows and Linux and of course the URL of our public git repository.