[samjohnson]

You might be interested in Cinder. It's a mature C++ library with multiplatform support: http://libcinder.org/

[yeureka]

Cinder is not written for performance. I use it just to open an window and get a basic update/render loop. It is too slow to write games in.

[EDIT] I will actually have a go with polycode to see if it solves the issues I have now with some other projects. Looks good.