This implementation of Markdown is licensed under the MIT License: The MIT License Copyright (c) 2012 Trent Mick Copyright (c) 2010 ActiveState Software Inc. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. All files in a *source package* of markdown2 (i.e. those available on pypi.python.org and the Google Code project "downloads" page) are under the MIT license. However, in the *subversion repository* there are some files (used for performance and testing purposes) that are under different licenses as follows: - perf/recipes.pprint Python License. This file includes a number of real-world examples of Markdown from the ActiveState Python Cookbook, used for doing some performance testing of markdown2.py. - test/php-markdown-cases/... test/php-markdown-extra-cases/... GPL. These are from the MDTest package announced here: http://six.pairlist.net/pipermail/markdown-discuss/2007-July/000674.html - test/markdown.py GPL 2 or BSD. A copy (currently old) of Python-Markdown -- the other Python Markdown implementation. - test/markdown.php BSD-style. This is PHP Markdown (http://michelf.com/projects/php-markdown/). - test/Markdown.pl: BSD-style A copy of Perl Markdown (http://daringfireball.net/projects/markdown/).