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Version 3, 29 June 2007 Copyright © 2007 Free Software Foundation, Inc. < http://fsf.org/ > Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The GNU General Public License is a free, copyleft license for software and other kinds of works.
General Public License - GNU Project - Free Software Foundation
About Open Source Licenses Open source licenses are licenses that comply with the Open Source Definition — in brief, they allow software to be freely used, modified, and shared. To be approved by the Open Source Initiative (also known as the OSI), a license must be go through the Open Source Initiative's license review process . Popular Licenses The following OSI-approved licenses are popular, widely used, or have strong communities (as defined in the 2006 Proliferation Report ):