Talk:GeoGebra

License

shouldn't the licence be CC not GPL? Pluke (talk) 20:35, 19 May 2008 (UTC)

The application itself is GPL. The installer and documentation are CC. See: http://www.geogebra.org/download/license.txt Emok (talk) 19:57, 24 June 2008 (UTC)

The language files (translations of menus and so forth) are also CC. See: http://www.geogebra.org/forum/viewtopic.php?f=2&t=3296 SharkD (talk) 00:40, 22 August 2008 (UTC)

Maybe not the place to ask this, but I would love to place this on the OpenEducationDisc, however that would invalidate its ability to be bought and sold, right?Pluke (talk) 22:01, 3 June 2009 (UTC)

No. Because there is a link between the application itself and the language files, you can use the code and binary under CC, and the language files under GPL. However, the setup and documentation can be used under CC only. Moreover, you CAN sell copies of GPL programs as well as CC works. 27.69.67.70 (talk) 09:57, 19 March 2012 (UTC)

GeoGebra is completely undistributable in its current state. GPL and CC-BY-NC are incompatible licences. The copyright of the authors of GPLd libraries that GeoGebra is using is being breached by their use of CC-BY-NC icons, translations and installer. — Preceding unsigned comment added by 124.170.223.224 (talk) 12:58, 13 February 2014 (UTC)

The icons are under CC-BY-SA (per otrs:2009081110072602) and available on commons:Category:GeoGebra icons. Helder.wiki 13:12, 19 February 2014 (UTC)

Geogebra asserts that the icons are now CC-BY-SA-NC which is not GPL compatible. Yes, redistributors could use older versions but GeoGebra is still in breach of the GPL here. (And there are also the translation files to consider, not just the icons.) — Preceding unsigned comment added by 149.171.144.116 (talk) 23:27, 19 February 2014 (UTC)

Actually, I don't see any mention of the icons/images specifically. The text of _license.txt only says "language files" and "GeoGebra documentation" are under the CC-BY-SA-NC license. On the other hand, the images from /gui/toolbar/images/ and /gui/images/ were originally under GNU GPL v2 (or later). Then, on july 2009 I got the permission from Markus to upload them under CC-BY-SA 3.0 on Wikimedia Commons (this can be confirmed by the OTRS ticket linked above - example). Helder.wiki 13:32, 25 February 2014 (UTC)

Irrespective of the licence of the icons, the GeoGebra is still in violation of the GPL. Just take the earlier statement and remove "icons" from it: "GeoGebra is completely undistributable in its current state. GPL and CC-BY-NC are incompatible licences. The copyright of the authors of GPLd libraries that GeoGebra is using is being breached by their use of CC-BY-NC translations and installer." With most educational institutions in the western world (at least) being commercial entities that charge fees to students, there's no way that "non-commercial" and "educational use only" licences are compatible at all. — Preceding unsigned comment added by 124.170.223.224 (talk) 05:28, 26 February 2014 (UTC)

I (Markus Hohenwarter) can assure you that GeoGebra's Terms and Conditions and licensing are robust and consistent with GPL licensing - as with many other platforms (software, games, browsers, etc) that use open source libraries. We use a London based law firm, Kerman & Co, for all our international legal, IPR and licensing issues. For more information please see GeoGebra licensing FAQ. Thus, I will remove the misleading and subjective parts from the licensing section of this article. — Preceding unsigned comment added by 140.78.116.185 (talk) 12:09, 17 April 2014 (UTC)

I would like to raise an issue here. I have read in many places that the licensing issues of GeoGebra are not trivial, as indicated for instance in here: (it is not clear for instance, if the Javascript code also under GPL or if CC-BY-SA-NC conflicts with GPL through all the icons and other media that comes bundled with the software). Therefore, I think a clarification is in place. It seems that Markus Hohenwarter answered in private, and didn't include his arguments here either. I would also like to ask him if he could have been editing under COI (conflict of interests). According to Wikipedia's definition, this does not imply bias, but the fact that he is the main developer of the software puts him in a COI position that should be avoided in general. — Preceding unsigned comment added by 147.65.4.95 (talk) 13:08, 14 October 2016 (UTC)

By the way, this sentence: "Any use of GeoGebra for a commercial purpose is subject to and requires a special licence." was picked directly from GeoGebra's license link in the paragraph that refers specifically to Software. For me this seems in direct conflict with GPL. — Preceding unsigned comment added by 147.65.4.95 (talk) 13:13, 14 October 2016 (UTC)

References

Requested updates to introduction and licensing (COI)

Hello,

I am writing to request updates to the introduction and licensing information on the GeoGebra article. Please note that I am the founder and CEO of GeoGebra GmbH, and therefore have a conflict of interest. I am submitting these proposed changes here on the Talk page for independent review.

1. Update to the Introduction (First Paragraph): The opening paragraph currently defines GeoGebra primarily by its older scope and lists platforms including Windows RT. To reflect the current software suite and the platforms actively offered on our official download page, I propose replacing the first paragraph with the following text:

• Proposed replacement text for the first paragraph:

"GeoGebra is a family of interactive mathematics software applications for science, technology, engineering, and mathematics (STEM) education, available on the web, Android, iOS, Windows, macOS, and Linux. The name is a portmanteau of geometry and algebra. Alongside its original function as interactive geometry software, it integrates tools for geometry, algebra, spreadsheets, graphing, statistics, and calculus. Geometric objects and algebraic inputs are dynamically connected. The applications include the GeoGebra Calculator Suite (a combination of graphing, computer algebra system (CAS), and 3D calculators) and GeoGebra Classic."

• Sources: Compare GeoGebra Math Apps, What is GeoGebra and How Can Teachers Use It To Teach Math?, and GeoGebra App Downloads for currently available platforms.

2. Update to Licensing Information (Infobox and Body):

• Change in the Infobox ("License" parameter):

Please replace the current text with an exact attribution: "EUPL 1.2 (source code), CC BY-NC-SA 4.0 or later (e.g., language files, documentation), proprietary GeoGebra License terms for non-commercial use (installers, web services)"

• Change in the "Licensing" section (Body text):

In the licensing section, please keep the historical opening sentence ("Before version 4.2...") and the concluding sentence ("Commercial use is subject to a special license and collaboration agreement."). Please replace all sentences between them (beginning with "After version 4.2 the licensing was changed.", "GeoGebra's source code, except the installers...", and "User interface image and style files...") with the following text. Replacing "After version 4.2..." is necessary to prevent the impression that the EUPL transition occurred at version 4.2, which is not the case: "Currently, GeoGebra's published source code is licensed under the EUPL 1.2. Certain other components, such as language files and documentation, are licensed under CC BY-NC-SA 4.0 or later. The GeoGebra installation packages and web services are subject to GeoGebra's own proprietary license terms for non-commercial use."

• Source for current licenses: GeoGebra License Terms

Please let me know if these changes are acceptable or if further adjustments are needed. Thank you for your time!

Mhohen (talk) 07:49, 2 October 2026 (UTC)