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Source 2 is a video game engine developed by Valve. The engine was announced in 2015 as the successor to the original Source engine, with the first game to use it, Dota 2, being ported from Source that same year. Other Valve games such as Artifact, Dota Underlords, Half-Life: Alyx, Counter-Strike 2, and Deadlock have been produced with the engine.
Source Filmmaker (SFM) is a 3D animation application that was built from within the Source engine. [34] Developed by Valve, the tool was originally used to create movies for Day of Defeat: Source and Team Fortress 2. It was also used to create some trailers for Source Engine games. SFM was released to the public in 2012.
The Open Source Initiative (OSI) is one such organization keeping a list of open-source licenses. [1] The Free Software Foundation (FSF) maintains a list of what it considers free. [ 2 ] FSF's free software and OSI's open-source licenses together are called FOSS licenses.
Other projects, such as NetBSD, use a similar 2-clause license. [16] This version has been vetted as an Open source license by the OSI as the "Simplified BSD License." [5] The ISC license without the 'and/or' wording is functionally equivalent, and endorsed by the OpenBSD project as a license template for new contributions. [17]
Popular open source licenses include the Apache License, the MIT License, the GNU General Public License (GPL), the BSD Licenses, the GNU Lesser General Public License (LGPL) and the Mozilla Public License (MPL). Open-source licenses are software licenses that allow content to be used, modified, and shared. They facilitate free and open-source ...
A second use of multi-licensing with free software is for license compatibility, [1] allowing code from differently licensed free software projects to be combined, or to provide users the preference to pick a license. Examples include the source code of Mozilla Application Suite and previously Mozilla Thunderbird and Mozilla Firefox, that have ...
Microsoft's Shared Source Initiative, launched in May 2001, comprises 5 licenses, 2 of which are open-source and 3 of which are restricted. The restricted licenses under this scheme are the Microsoft Limited Public License (Ms-LPL), [20] the Microsoft Limited Reciprocal License (Ms-LRL), [21] and the Microsoft Reference Source License (Ms-RSL ...
Copyleft licenses (also known as "share-alike"), [46] require source code to be distributed with software and require the source code be made available under a similar license. [ 48 ] [ 49 ] Copyleft represents the farthest that reuse can be restricted while still being considered free software. [ 50 ]