Powerful and easy-to-use embedded GUI library with many widgets
Free and open source voxel art tools - editor, thumbnailer and format
LDraw™ editor for LEGO® style digital building instructions.
Improved JPEG encoder
a free library to read and display PNG images.
Complete solution for HDR photography
A shader-based software renderer written from scratch in C89
A C99 implementation for reading/writing WMF and EMF Graphic Metafiles
Multi-view camera description format for OpenGL visual computing
A set-square on your screen!
Solution and project files for compiling pixman/cairo with VS2012
Win32 OpenGL Extension API
https://github.com/horde3d/Horde3D
3D Engine technology with partial tools developing kit.
A Tcl/Tk widget for OpenGL rendering.