http://www.boutell.com/gd/ is the web page of the original author of the
GIF creation library GD.   Originally, when [Compuserve] created GIF, the
file format most commonly used included a compression algorithm that was
patented by UNISYS.  When UNISYS began enforcing their patent, work on
free GIF creation libraries shifted from generating compressed files using
the patented algorithm to creating image files uncompressed.

The UNISYS patent has expired, and libgd is alive and well.

[BR] - ??  IANAL, and sources on the 'net are not really reliable for
legal advice, but according to the LPF
[http://lpf.ai.mit.edu/Patents/Gif/Gif.html] the patent will expire
in June (the LPF site seems to be down, a Google cache is at
[http://www.google.com/search?q=cache:http://lpf.ai.mit.edu/Patents/Gif/Gif.html])


  http://martin.gleeson.com/fly/installation.html

  http://www.rime.com.au/gd/










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