- Burn All GIFs - http://burnallgifs.org/
Information on upgrading a web site from the patent-encumbered GIF format to freely available graphics.
- US4558302 Patent - http://www.delphion.com/details?pn=US04558302__
The US patent covering the LZW compression algorithm used in GIF images.
- GIF Economy: A Cautionary Tale - http://cloanto.com/users/mcb/19950127giflzw.html
Article on the GIF controversy seen from a software developer's perspective. Includes original interviews, a historical perspective, up-to-date information and a detailed bibliography.
- The gif2png Home Page - http://catb.org/~esr/gif2png/
The program converts files from the Graphic Interchange Format to Portable Network Graphics. The conversion preserves all graphic information, including transparency. The program can recover data from corrupted GIFs.
- Graphics Interchange Format - http://www.w3.org/Graphics/GIF/spec-gif87.txt
Original specification describing the file layout as originated by CompuServe. Also known as Gif87a.
- Graphics Interchange Format - http://256.com/gray/docs/gifspecs/
Provides detailed specification of file layout, encoding and decoding algorithm, and color space model for gif89a.
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