Re: Possible GPL violation: Geogebra

[Bruce Perens]

On 01/28/2014 03:03 AM, Sylvestre Ledru wrote: From it last few releases, geogebra is released under GPL with a non commercial clause. It's more complicated than that. The program itself is under straight GPL3. You may use the program for any purpose, commercial or otherwise. The installers and "web services" (which seems to mean things from their web site) are under their odd license. Once the program is installed you can use it for any purpose, commercial or otherwise, as long as you don't make use of their web site from the program. If you were to provide your own installer, you could license it any way you wished. The only way that your program might be infringed is that GPL3 isn't compatible with GPL2 unless you have the "or any later version" language in your copyright statement. Their legal team might be experienced in that they can tell that something is legal or not. They have not, however, been terribly effective if their goal was to prevent commercial use of the program. There is nothing terribly impressive about their output, "legal team" probably means they have an attorney and not necessarily a particularly savvy one. This is just begging for a fork. In your place I might make my installer and publish the whole thing under GPL3, just to make the point.     Thanks     Bruce