There are other libraries out there for graphics:
- Allgero (for Game Programming)
- wxWidgets (mostly GUI, but I think you may be able to do some graphics using it.)
- GTK+ (same as above)
- FLTK (same as above)
I would recommend Qt or SFML (2.0-2.1) as they are both easy to learn and use. i am in the process of learning Qt (5.1.1) at the moment and have found that it is incredibly helpful for making gui applications.