lib3ds is a free ANSI-C library for working with the popular "3ds" 3D model format. Supported platforms include GNU on Unix and Cygwin, and MS Visual C++ 6.0. lib3ds loads and saves Atmosphere settings, Background settings, Shadow map settings, Viewport setting, Materials, Cameras, Lights, Meshes, Hierarchy, Animation keyframes. It also contains useful matrix, vector and quaternion mathematics tools. lib3ds usually integrates well with OpenGL. In addition, some diagnostic and conversion tools are included.