Copperspice licenses and proprietary applications

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marlowa
Posts: 112
Joined: Sun Oct 25 2015 10:52 am

Copperspice licenses and proprietary applications

Post by marlowa »

I wonder what the Copperspice position is on it being used to develop proprietary applications. Qt has a dual license arrangement. Basically Qt is open source unless you are using it to develop something that is proprietary (in which case you have to pay).

barbara
Posts: 165
Joined: Sat Apr 04 2015 2:32 am

Re: Copperspice licenses and proprietary applications

Post by barbara »

The CopperSpice libraries are released under GNU GPL version 3 and LGPL version 2.1. We can not provide a proprietary license. If requested we can provide paid support or contract work to enhance CopperSpice.

LGPL version 2.1 absolutely allows developers the right to create and sell closed source applications.

Barbara

marlowa
Posts: 112
Joined: Sun Oct 25 2015 10:52 am

Re: Copperspice licenses and proprietary applications

Post by marlowa »

barbara wrote:The CopperSpice libraries are released under GNU GPL version 3 and LGPL version 2.1. We can not provide a proprietary license. If requested we can provide paid support or contract work to enhance CopperSpice.
LGPL version 2.1 absolutely allows developers the right to create and sell closed source applications.
Barbara
Thanks for clearing that point up. I note that Qt 5.7 has recently (16th June 2016) been released in which they have changed the license. LGPL 2.1 has been dropped. LGPL version 3 is used "for almost all frameworks and libraries" and GPL version 3 is used for tools such as Qt Creator.

ansel
Posts: 74
Joined: Fri Apr 10 2015 8:23 am

Re: Copperspice licenses and proprietary applications

Post by ansel »

As you mention, the Qt 5.7 release definitely changed their license model. CopperSpice will remain LGPL 2.1, and we will not be porting any features or examining code from Qt 5.7 or later for this reason. The only possible license change for CopperSpice would be if the opportunity arose to relicense under more permissive terms, such as a BSD/MIT style license.

We wish CopperSpice to be as open as possible for use by all kinds of applications, both open source and proprietary.
Ansel Sermersheim
CopperSpice Cofounder

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