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.

Reciprocal Public License (RPL-1.5) Version 1.5, July 15, 2007 Copyright (C) 2001-2007 Technical Pursuit Inc., All Rights Reserved. PREAMBLE The Reciprocal Public License (RPL) is based on the concept of reciprocity or, if you prefer, fairness. In short, this license grew out of a desire to close loopholes in previous open source licenses, loopholes that allowed parties to acquire open source software and derive financial benefit from it without having to release their improvements or derivatives to the community which enabled them. This occurred any time an entity did not release their application to a "third party". While there is a certain freedom in this model of licensing, it struck the authors of the RPL as being unfai...

Secure Messaging Protocol (SMP) Libraries [ACL, CML, SFL] Distribution Rights All source code for the SMP is being provided at no cost and with no financial limitations regarding its use and distribution. Organizations can use the SMP without paying any royalties or licensing fees. The SMP was originally developed by the U.S. Government. BAE Systems is enhancing and supporting the SMP under contract to the U.S. Government. The U.S. Government is furnishing the SMP software at no cost to the vendor subject to the conditions of the SMP Public License provided with the SMP software. 29 May 2002 Secure Messaging Protocol (SMP) Public License The United States Government/Department of Defense/National Security Agency/Office of Ne...

IPA Font License Agreement v1.0 (090305)   The Licensor provides the Licensed Program (as defined in Article 1 below) under the terms of this license agreement ("Agreement").  Any use, reproduction or distribution of the Licensed Program, or any exercise of rights under this Agreement by a Recipient (as defined in Article 1 below) constitutes the Recipient's acceptance of this Agreement.   Article 1 (Definitions) 1.         "Digital Font Program" shall mean a computer program containing, or used to render or display fonts. 2.         "Licensed Program" shall mean a Digital Font Program licensed by the Licensor under this Agreement. 3.         "Derived Program" shall mean a...

Artistic License 2.0 Copyright (c) 2000-2006, The Perl Foundation. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble This license establishes the terms under which a given free software Package may be copied, modified, distributed, and/or redistributed. The intent is that the Copyright Holder maintains some artistic control over the development of that Package while still keeping the Package available as open source and free software. You are always permitted to make arrangements wholly outside of this license directly with the Copyright Holder of a given Package. If the terms of this license do not permit the full use that you propose to ma...

Zimbra Public License, Version 1.4 (ZPL) This Zimbra Public License (this “Agreement”) is a legal agreement that describes the terms under which Zimbra, Inc., a Texas corporation (“Zimbra”) will provide software to you via download or otherwise (“Software”). By using the Software, you, an individual or an entity (“You”) agree to the terms of this Agreement. In consideration of the mutual promises and upon the terms and conditions set forth below, the parties agree as follows: 1. Grant of Copyright License 1.1 - Subject to the terms and conditions of this Agreement, Zimbra hereby grants to You, under any and all of its copyright interest in and to the Software, a royalty-free, n...

People : Open Source Enthusiasts

A collection of open source and copyleft license writers.

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