Yes, under the GPL once they have the source they must be able to redistribute it as they see fit so they may charge people for it or give it away for free. However they must distinguish it from your version (you may trademark the product name for instance as Mozilla do) and provide proper attribution - i.e. they must indicate their application is based on your source code.
My main question is whether you are allowed to charge $X before the user may access the source code. Regards, Joseph Earl From: Carl Boettiger [mailto:[email protected]] Sent: 28 January 2010 00:03 To: Earl, Joseph Cc: [email protected] Subject: Re: [Help-gsl] Permissions for using GSL in my own software On Wed, Jan 27, 2010 at 3:45 PM, Earl, Joseph <[email protected]<mailto:[email protected]>> wrote: I have a question on GSL GPL, in the FAQ it states: 1) Does the GPL allow me to charge a fee for downloading the program from my site? Yes. You can charge any fee you wish for distributing a copy of the program. If you distribute binaries by download, you must provide "equivalent access" to download the source-therefore, the fee to download source may not be greater than the fee to download the binary. 2) Does the GPL allow me to sell copies of the program for money? Yes, the GPL allows everyone to do this. The right to sell copies is part of the definition of free software. Except in one special situation, there is no limit on what price you can charge. (The one exception is the required written offer to provide source code that must accompany binary-only release.) So the following should be allowed? - Charge $X for an application binary and required written offer to provide the source code for free - and charge anything up to $X for the source code only (for people who do not purchase the binary) And would it then be allowed for someone to pay $X for the source, and then put it up on their own website and distribute it for free (with attribution, and under GPL, etc) ? Regards, Joseph Earl -----Original Message----- From: help-gsl-bounces+joseph.earl06=imperial.ac.uk<http://imperial.ac.uk>@gnu.org<http://gnu.org> [mailto:help-gsl-bounces+joseph.earl06<mailto:help-gsl-bounces%2Bjoseph.earl06>=imperial.ac.uk<http://imperial.ac.uk>@gnu.org<http://gnu.org>] On Behalf Of Brian Gough Sent: 22 January 2010 15:30 To: Vicent Cc: [email protected]<mailto:[email protected]> Subject: Re: [Help-gsl] Permissions for using GSL in my own software At Sat, 16 Jan 2010 14:26:03 +0100, Vicent wrote: > But if I develop a software of my own and I register or patent it, am I > allowed to use GSL inside it??? > > Sorry if this is a too easy question. Anyway, I would appreciate any > feedback. Information about the license: http://www.gnu.org/licenses/gpl-faq.html See also the brief description at http://www.gnu.org/software/gsl/ under "Licensing" _______________________________________________ Help-gsl mailing list [email protected]<mailto:[email protected]> http://lists.gnu.org/mailman/listinfo/help-gsl _______________________________________________ Help-gsl mailing list [email protected]<mailto:[email protected]> http://lists.gnu.org/mailman/listinfo/help-gsl -- Carl Boettiger Population Biology, UC Davis http://two.ucdavis.edu/~cboettig _______________________________________________ Help-gsl mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-gsl
