X libjpeg for JPEG: http://www.ijg.org/
X libtiff for TIFF: http://www.remotesensing.org/libtiff/
X libgif for GIF: http://sourceforge.net/projects/giflib/
X libjpeg for JPEG: http://www.ijg.org/
X libtiff for TIFF: http://www.remotesensing.org/libtiff/
X libgif for GIF: http://sourceforge.net/projects/giflib/