GNU General Public License
BSD License
MIT License
Apache License
Creative Commons
(Link: A Short Guide To Open-Source And Similar Licenses – Smashing Magazine)
A Short Guide To Open-Source And Similar Licenses – Smashing Magazine
Why the GPL does not apply to premium WordPress themes — perpetual beta | release
Why aren’t WordPress themes automatically covered by the GPL?
There’s been a firestorm brewing in the relatively small world of WordPress premium theme designers, after WordPress founder Matt Mullenweg broadly asserted that themes built to run on the WordPress platform – and by implication, plugins and anything else that hooks into the WordPress system – are covered by the GPL.
This is important, because if Matt is correct, then anyone who gets a copy of a premium theme then has the right to freely distribute it or modify it virtually without restriction (expect, of course, those restrictions found in the GPL itself). Understandably, even though some voluntarily release their themes under the GPL, many premium theme designers object to having their code distributed for free.
Matt, who is an outspoken proponent of open-source software, has explained that designers can still make money off GPL code by providing support and other valuable resources to users of that code.
(Link: Why the GPL does not apply to premium WordPress themes — perpetual beta | release)


March 24, 2010
