Licenses. Published software should be free software.
To make it free software, you need to release it under a free software license. We normally use the GNU General Public License (GNU GPL), but occasionally we use other free software licenses. We use only licenses that are compatible with the GNU GPL for GNU software. Documentation for free software should be free documentation, so that people can redistribute it and improve it along with the software it describes. To make it free documentation, you need to release it under a free documentation license. PHP Hypertext Preprocessor. Manual 2.2.1 Installing MySQL on Windows. MySQL The World's Most Popular Open Source Database.