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.

ODC Attribution License (ODC-By) Preamble The Open Data Commons Attribution License is a license agreement intended to allow users to freely share, modify, and use this Database subject only to the attribution requirements set out in Section 4. Databases can contain a wide variety of types of content (images, audiovisual material, and sounds all in the same database, for example), and so this license only governs the rights over the Database, and not the contents of the Database individually. Licensors may therefore wish to use this license together with another license for the contents. Sometimes the contents of a database, or the database itself, can be covered by other rights not addressed here (such as private contra...

1. DefinitionsAccess control mechanism: a technological measure which, in the ordinary course of its operation, requires the application of information, or a process or a treatment, with the authority of the copyright owner or related rights owner, to gain access to the work.Acts authorised by licensor: acts concerning granted rights (in particular, act of access, act of copy, act of modification, act of sharing).Acts not authorised by licensor: acts concerning copyright or possible moral rights.Author/s: the creator/s of an original work or the creator/s of a derivative work.Broadcasting: the use of any means of distribution over a distance, such as telegraph, telephone, radio, television and other comparable media, including comm...

February 2002 Preamble -------- The Berkeley Software Distribution ("BSD") license has proven very effective over the years at allowing for a wide spread of work throughout both commercial and non-commercial products. For programmers whose primary intention is to improve the general quality of available software, it is arguable that there is no better license than the BSD license, as it permits improvements to be used wherever they will help, without idealogical or metallic constraint. This is of particular value to those who produce reference implementations of proposed standards: The case of TCP/IP clearly illustrates that freely and universally available implementations leads the rapid acceptance of standards -- often even be...

The Definition An open software service is one: Whose data is open as defined by the Open Knowledge Definition with the exception that where the data is personal in nature the data need only be made available to the user (i.e. the owner of that account). Whose source code is: Free/Open Source Software (that is available under a license in the OSI or FSF approved list — see note 3). Made available to the users of the service.


• "The Software shall be used for Good, not Evil." (From : JSON License.)

People : Open Source Enthusiasts

A collection of open source and copyleft license writers.

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