Sage-Tips

Can GPL software make money?

GPL allows you to sell the software. It doesn’t restricts anyone from selling and make money out of it. Only thing is that if you license your software to GPL.

What is GNU GPL are you allowed to modify brand and sell a software product that is published by someone else under the GNU GPL license?

The GPL says that your modified versions must carry all the freedoms stated in the GPL. Thus, anyone who receives a copy of your version from you has the right to redistribute copies (modified or not) of that version. You may not distribute any version of the work on a more restrictive basis.

How do I sell my GPL?

This is explained in subsections 6a and 6b of the GPL: if you want to sell a binary copy of a GPL software program, you must include either its complete source code or a written, formal offer valid at least three years to provide it to whoever possesses the binary.

Will you make an exception for a GNU program under the GPL?

Using a certain GNU program under the GPL does not fit our project to make proprietary software. Will you make an exception for us? It would mean more users of that program. If a programming language interpreter is released under the GPL, does that mean programs written to be interpreted by it must be under GPL-compatible licenses?

Is it legal to sell GPL software for zero price?

The people to whom you sold copies of GPL software are just as free as you are to make copies and sell them for whatever price they feel is right, including a price equal to zero. The same general conditions apply to other popular FOSS licenses. OpenOffice, for example, is distributed under the Apache license.

Can I distribute a modified version of a project under the GPL?

No. The GPL says that your modified versions must carry all the freedoms stated in the GPL. Thus, anyone who receives a copy of your version from you has the right to redistribute copies (modified or not) of that version. You may not distribute any version of the work on a more restrictive basis.

Can You incorporate GPL-covered software into a proprietary system?

You cannot incorporate GPL-covered software in a proprietary system. The goal of the GPL is to grant everyone the freedom to copy, redistribute, understand, and modify a program. If you could incorporate GPL-covered software into a nonfree system, it would have the effect of making the GPL-covered software nonfree too.