A personal message from Nick Bolton,
Founder & CEO of Synergy Si, Inc.
We have made the decision to charge a small fee for Synergy. This allows us to hire more software engineers so we can improve Synergy faster. We found that given the option, only 0.002% of users chose to donate.
Many people believe that the spirit of the GPL license is that you should not charge money for distributing copies of your software. This is a misunderstanding. Read more about this in the article, Selling Free Software by the Free Software Foundation.
Synergy is still open source and "free as in free speech" (to quote Richard Stallman), except that now there's a small fee to download the software. As with all GPL licensed software, you are free to run the program, change the program, and redistribute the program with or without changes.
Thanks for your understanding. I hope you decide to purchase Synergy and support the development of free and open source software.
Founder & CEO
Synergy Si, Inc.