License FAQ

What are the requirements for me when I use GPL software?
You must release any derivative work under GPL license as well.

Does the license allow someone to sell an extension?
Yes, GPL does allow you to charge fee for your work. However, the recipients are allowed to redistribute your work as well.

Does the license allow someone to encrypt an extension?
Yes, technically. But the GPL requires that a distributor provide access to the complete and unencrypted source code by either including it in the package or by making it available for download.

Can I release an extension under a non-GPL license?
If your extension is a derivative work of Kooboo, it must be licensed under GPL. If you developed proprietary software and only make connections to Kooboo, you are not required to release the source code of your proprietary software.

What if I violate the Kooboo GPL license?
We do not have the will or the ability to go after anyone who violates our license. We do kindly ask everyone to comply with the license voluntarily.

What is the difference between Commercial software and Proprietary software?
Commercial software means that there is some sort of commercial activity surrounding that software. Proprietary software means that you do not have the right to copy, modify, and redistribute that software. Commercial software is not necessarily proprietary software and vice versa.

What are the rebrand and relicense rights of Kooboo Professional Edition?
This right grants you freedom to use Kooboo without the limitation of GPL license.

What is the difference between the GPL and the LGPL?
The GNU GPL is intended to be used for applications.  The GNU LGPL is intended to be used for application libraries. The LGPL does not require you to release your work under the GPL compatible license.

Which third party components did you use in Kooboo, and what are the requirements of those components?
Kooboo used only open source third party components. Below is the list and their license: 


Name; license; special requirement

  • CssScript; CPOL
  • EXTJS3.0; GPL
  • Nbear; BSD (BSD License not included, we are part of the development team)
  • YUI; BSD (BSD License included)
  • Lucene; Apache
  • DotNetZip; MS-PL
  • Enterprise Library; MS-PL

Where can I know more information about GPL?
See the FAQ page from "Free Software Foundation"
http://www.gnu.org/licenses/gpl-faq.html