Open-Source licenses - sites beginning with: G

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• GPL - GNU General Public License   
  One standard for licensing free software.
  
  http://www.gnu.org/copyleft/gpl.html

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• LGPL - GNU Lesser General Public License   
  An extended standard for licensing free software.
  
  http://www.gnu.org/copyleft/lesser.html

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• List of Licenses   
  Various Licenses and comments about them.
  
  http://www.gnu.org/philosophy/license-list.html

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• GNU Free Documentation License   
  A version of the GPL for reference material.
  
  http://www.gnu.org/copyleft/fdl.html

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