A license that allows you not to open and commercially use derived code?

Question

CMS

I hope for your help!

The bottom line is simple: I want to open the source code of my CMS, but in such a way that the derived code can be made a commercial product with already closed sources , for sale to a specific company in full ownership.

Thus, whatever happens "with the last", the original code remains open.

Do such licenses exist? So that later it would be possible, in which case, to defend their case in the court of our country. To play it safe once again, so to speak ...

Answer 1

BSD and generally completely free licenses allow you to do anything with the code, including closing the code and using it as you like.
Actually, the story with the TCP / IP stack is heard :)

Answer 2

zlib

Answer 3

It is not necessary to use the text of existing licenses. A license is the common name for a license agreement. If none of the existing options suits you, then create your own.

Answer 4

BSD, MIT, Apache and probably a few more.

Answer 5

Excuse me, but why close the fork code? On the contrary, demand openness, with a clear indication of you as the author.
www.apache.org/licenses/LICENSE-2.0 is fine for you. Well, or you can try creativecommons.org/licenses/by/2.0/

Answer 6

Disclaimer: I am not a lawyer and this is not legal advice.
As the author, you can do whatever you want with your code. You can post the code under any Open Source or Free Software license, but sell at least the same code to a specific customer, without changes, under a closed one. Look at the old Qt licensing policy for example.

Answer 7

Thank you all, if anyone is interested, I found the translations.
www.p-os.ru/dokumenty/liczenzii/90-bsd-russkij-perevod.html
licenseit.ru/wiki/index.php/MIT_License