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- License
- #######
- MIT or GPLv2
- ============
- A full Elgg package that includes the framework and a core set of plugins
- is available under version 2 of the `GNU General Public License`__ (GPLv2).
- We also make the framework (without the plugins) available under the MIT license.
- __ http://www.gnu.org/licenses/gpl-2.0.html
- FAQ
- ===
- The following answers are provided as a convenience to you; they are not legal counsel.
- Consult with a lawyer to be sure about the answers to these questions.
- The Elgg Foundation cannot be held responsible for decisions you make based on what you read on this page.
- For questions not answered here, please refer to the `official FAQ for the GPLv2`__.
- __ http://www.gnu.org/licenses/gpl-faq.html
- How much does Elgg cost?
- ------------------------
- Elgg is free to download, install, and use.
- If you’d like to donate, we do appreciate our `financial supporters`__!
- __ http://elgg.org/supporter.php
- Can I remove the Elgg branding/links?
- -------------------------------------
- Yes.
- Can I modify the source code?
- -----------------------------
- Yes, but in general we recommend you make your modifications as plugins
- so that when a new version of Elgg is released, the upgrade process is as painless as possible.
- Can I charge my users membership fees?
- --------------------------------------
- Yes.
- If I modify Elgg, do I have to make the changes available?
- ----------------------------------------------------------
- No, if you are using Elgg to provide a service, you do not have to make the source available.
- If you distribute a modified version of Elgg, then you must include the source code for the changes.
- If I use Elgg to host a network, does The Elgg Foundation have any rights over my network?
- ------------------------------------------------------------------------------------------
- No.
- What’s the difference between the MIT and GPL versions?
- -------------------------------------------------------
- Plugins are not included with the MIT version.
- You can distribute a commercial product based on Elgg using the MIT version without making your modifications available.
- With the GPL licensed version, you have to include make your modifications of the framework public if you redistribute the framework.
- Why are plugins missing from the MIT version?
- ---------------------------------------------
- The plugins were developed under the GPL license, so they cannot be released under an MIT license.
- Also, some plugins include external dependencies that are not compatible with the MIT license.
- May I distribute a plugin for Elgg under a commercial license?
- --------------------------------------------------------------
- We believe you can, since plugins typically depend only the core framework and the framework is available under the MIT license.
- That said, we really recommend you consult with a lawyer on this particular issue to be absolutely sure.
- Note that plugins released via the community site repository must be licensed under a GPLv2-compatible license.
- They do not necessarily have to be GPLv2, just compatible (like MIT).
- Can we build our own tool that uses Elgg and sell that tool to our clients?
- ---------------------------------------------------------------------------
- Yes, but then your clients will be free to redistribute that tool under the terms of the GPLv2.
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