Hello list,
It’s important to remember that open-source is different than free, which is different than copy-left.
The two most prominent early examples of open-source software (Smalltalk and UNIX) were both very much copyrighted commercial products of large companies.
By the same token, there are many free software applications these days that are closed-source, distributed as compiled binaries.
The copy-left made (in-) famous by the GNU project says, “by incorporating this software into your own (or even using these tools [e.g., gcc] to develop your software), you are required to make your software free and open-source.
Either way, end-user licenses are free to stipulate any conditions on the use of the software that the developer wishes, such as, “By using this software, the end-user commits to name their first-born child Moonbeam,” or, as in the case of both JUCE and Visualworks, “free for non-commercial use only.”
stp
--------Stephen Travis Pope Ojai, California, USA 
http://HeavenEverywhere.com http://FASTLabInc.com
https://vimeo.com/user19434036/videos
http://heaveneverywhere.com/Reflections
On Dec 25, 2022, at 8:31 PM, rabbit <rabbit@callistohouse.org> wrote:
I am unfamiliar with FOSS licensing. Does anyone know about an open source license that allows free use for free software, but requires payment if its uses are for commercial software?
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