GIFLIB
 
GIFLIB is a package of portable tools and library routines for working with GIF images

Website: http://giflib.sourceforge.net/doc/
Platforms supported: Win32, Linux, DOS
Headers to include: gif_lib.bi
Header version: 4.2.1, 5.0.4 (#define __GIFLIB_VER__ to 4 or 5 if needed; default = 5)
Examples: yes, in examples/files/GIFLIB/