Welcome to CopyLeftLicense.com! Here you will find an archive of all the copyleft and open source licenses that have been published in the past. From Beerware Licensing, where you need to buy a beer for the open source programmer if you see them in a bar, to the fine-tuned and legally-curated Berkeley Software Distribution (BSD) License, we have it all. By knowing where we've come from, we might be able to learn where to go!

This archive contains 729 texts, with 682,528 words or 4,889,496 characters.

Licenses : Open Source and CopyLeft Licenses

A collection of open source and copyleft licenses.

ZPL 2.0 Zope Public License (ZPL) Version 2.0 This software is Copyright (c) Zope Corporation (tm) and Contributors. All rights reserved. This license has been certified as open source. It has also been designated as GPL compatible by the Free Software Foundation (FSF). Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Redistributions in source code must retain the above copyright notice, this list of conditions, and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions, and the following disclaimer in the documentati...

Version 1, 22 August 1998 Copyright 1998, Net Boolean Incorporated, Redwood City, California, USA All Rights Reserved. Note: This license is derived from the "Artistic License" as distributed with the Perl Programming Language. Its terms are different from those of the "Artistic License." PREAMBLE The intent of this document is to state the conditions under which a Package may be copied, such that the Copyright Holder maintains some semblance of artistic control over the development of the package, while giving the users of the package the right to use and distribute the Package in a more-or-less customary fashion, plus the right to make reasonable modifications. Definitions: "Package" refers to the collection of files...

ODC Open Database License (ODbL) Preamble The Open Database License (ODbL) is a license agreement intended to allow users to freely share, modify, and use this Database while maintaining this same freedom for others. Many databases are covered by copyright, and therefore this document licenses these rights. Some jurisdictions, mainly in the European Union, have specific rights that cover databases, and so the ODbL addresses these rights, too. Finally, the ODbL is also an agreement in contract for users of this Database to act in certain ways in return for accessing this Database. Databases can contain a wide variety of types of content (images, audiovisual material, and sounds all in the same database, for example), and s...

RealNetworks Public Source License Version 1.0 (Rev. Date October 28, 2002) 1. General Definitions. This License applies to any program or other work which RealNetworks, Inc., or any other entity that elects to use this license, ("Licensor") makes publicly available and which contains a notice placed by Licensor identifying such program or work as "Original Code" and stating that it is subject to the terms of this RealNetworks Public Source License version 1.0 (or subsequent version thereof) ("License"). You are not required to accept this License. However, nothing else grants You permission to use, copy, modify or distribute the software or its derivative works. These actions are prohibited by law if You ...

psfrag.dtx Copyright (C) 1996 Craig Barratt, Michael C. Grant, and David Carlisle. All rights are reserved. This system is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Don't come complaining to us if you modify this file and it doesn't work! If this file is modified by anyone but the authors, those changes and their authors must be explicitly stated HERE.

People : Open Source Enthusiasts

A collection of open source and copyleft license writers.

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