Linked Questions

-3 votes
1 answer

Can you commercialize your own GPL product? [duplicate]

I've been wanting to make my own open-source project under the GPL. However, I was thinking of making a paid "professional" version that adds features that are closed-source. Is this possible? Edit:...
  • 9
-1 votes
1 answer

Does the GPL/RPL Apply to me as Well? [duplicate]

I want to create a commercial application, but I want to make a significant portion of my back-end open source. It applies some really interesting math that I want people to learn from, but I don't ...
  • 109
1 vote
1 answer

GPL copyright owner copyleft [duplicate]

If a GPL owner decides to make their code close sourced, say to make a derivative work for themselves (maybe commercialize), what steps should they take? If they need to rewrite their code, what ...
  • 23
1 vote
0 answers

If the original author updates their program, is it now a modified work? [duplicate]

Lets say programmer Ed has made program foo and the program is licensed under the GPL license. If Ed updates his program, is that now a derivative or modified work? What if John contributes to ...
  • 11
2 votes
0 answers

Do I own GPLv3 code that I wrote? [duplicate]

This is a hypothetical question, that has not happened, so please no advice. If I publish some code on GitHub with the GPLv3 license, then want to use that code in proprietary software that I will ...
1 vote
0 answers

Do I need to share source code with GPL/AGPL if I am the owner? [duplicate]

if I build something under GPL/AGPL license, am I obligated to share that code if I have users using this service event when I am the owner of the code?
29 votes
4 answers

Can I use my own GPL'ed code in my closed source program?

Let's say that program A was made by me, with me being the sole copyright holder. If I license this program under the GPL-3.0, can I use that program in program B that is closed source?
12 votes
4 answers

Red Hat acquires Ansible - why?

In October 2015, Red Hat acquired Ansible, the developer of the famous configuration management software Ansible, apparently for a price of about $100M. Ansible, the software, AFAIK is licensed fully ...
  • 429
7 votes
2 answers

Does software released under GPLv3 require a copyright notice?

If a project using GPL-3.0-or-later doesn't include a copyright notice, does it violate the license? What would the consequences be? I'm asking because
  • 225
2 votes
1 answer

Can I sell my project using GNU GPL v3?

At first, I always developed commercial projects only, so I bad know GNU licenses. Now, I want to make my library available for other developers. And maybe to find co-developers. So, I chosen GNU GPL ...
4 votes
2 answers

Under what conditions can someone dual licence existing works?

When software is diffused under an open-source licence I imagine that a project becomes the "intellectual property" of the community. However, I'm not clear about this answer in that an author agrees ...
  • 365
3 votes
2 answers

Can I give the software gratis and charge for the source? (and still be FOSS ?)

A friend and I developed a software which we would like to be free as in freedom. We would like our software to be available to anyone for no money, but we would like to sell the source code to those ...
  • 251
4 votes
2 answers

Release GPL/Open version of project, still sell proprietary license?

Having witnessed projects such as LUFA, which are open source with the MIT license but still have a purchase button for a proprietary license of the toolbox (revoking the MIT License and offering ...
  • 143
5 votes
1 answer

Can I release a fork of an LGPL project under a commercial licence?

In the past I have made use of a third party project released under the LGPL licence. Recently the owner/creator of the project has archived the original repo and created a new version (seemingly ...
1 vote
1 answer

Trying to understand MIT, BSD and Apache 2.0 licenses and attribution with real examples

Trying to make sense on how MIT, BSD and Apache 2.0 licenses and attribution work, I've taken some real examples from GitHub. The open source software projects below are classified according to these ...

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