Licensing

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** [http://www.gnu.org/copyleft/gpl.html GPL GNU General Public License] - original example of a free software license; most widely used.
** [http://www.gnu.org/copyleft/gpl.html GPL GNU General Public License] - original example of a free software license; most widely used.
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** [http://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0]
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** [http://www.freebsd.org/copyright/freebsd-license.html FreeBSD License]
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** [http://www.microsoft.com/opensource/licenses.mspx#Ms-RL Microsoft Reciprocal License]
** [http://www.gnu.org/licenses/license-list.html FSF free software list]
** [http://www.gnu.org/licenses/license-list.html FSF free software list]

Revision as of 13:18, 19 April 2010

  • Free software - permission for anyone to use, copy, and/or distribute, either verbatim or with modifications, either gratis or for a fee.
  • Copyleft software - free software whose derivatives and copies must also be distributed as free software.
  • Non-copyleft free software - Free software whose license allows derivatives to be turned into proprietary software.
  • Open source software - more or less the same collection of programs as free software with some exceptions.