Licenses
GIF+LZW This program's using LZW compression, which is patented by UniSys. It's possible, that it won't support GIF and TIFF (with LZW compression) in future versions - we'll see, how situation will go on...
NetPBM Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. This software is provided "as is" without express or implied warranty.
LibTIFF Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that (i) the above copyright notices and this permission notice appear in all copies of the software and related documentation, and (ii) the names of Sam Leffler and Silicon Graphics may not be used in any advertising or publicity relating to the software without the specific, prior written permission of Sam Leffler and Silicon Graphics.
LibPNG Thanks to Glenn Randers-Pehrson and all contributors of LibPNG project. It's a great library!
LibJPEG This software is based in part on the work of the Independent JPEG Group - the great JPEG library.
ZLib This software is based in part on the work of Mark Adler and Jean-loup Gailly - the great LZ77 compression library: ZLib.
This program also uses some lines of code from many free projects like ImageMagick and Grahics gems. Thank's to all, who created these projects :-)