Software license
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A software license is a legal instrument governing the use or redistribution of software.
A brief, written-out beta test software license issued by Macromedia in 1995
GNU General Public License
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The GNU General Public Licenses are a series of widely used free software licenses. The GPL is a copyleft license, which means that it guarantees end users the freedom to run, study, share, or modify
Software license
…license. Copyleft represents the farthest that reuse can be restricted while still being considered free software. Strong copyleft licenses, such as the GNU General Public License (GPL), allow for no reuse in proprietary software, while weak copyleft, such as the related GNU Lesser General Public License (LGPL), do allow reuse…
Richard Stallman at the launch of the first draft of the GNU GPLv3 at MIT in Cambridge, Massachusetts, United States. To his right is Columbia University law professor Eben Moglen, chairman of the Software Freedom Law Centre.
Printed GPL statements for consumer entertainment devices that incorporate GPL components