GFXprim is Open-source modular 2D bitmap graphics library with emphasis on speed and correctness. It comes batteries included, but free from bloat.

It includes:

• Graphical user interface widgets with object hierarchy and declarative layouts.
• Clean and non-intrusive implementations of elementary data structures.
• Multiple rendering backends supporting desktop to embedded.
• Integrations with many image loaders.
• Image filters
• Sample applications including image and PDF viewers.
• Many tests

See http://gfxprim.ucw.cz for details.