Although Creative Commons takes up the lion’s share of open content licensing, there are other open content licenses out there. Many were part of an original “Copyleft” movement, which was a collection of licenses that worked similarly to the ShareAlike license, all derivative works had to be offered under the same license. Note that some of these licenses were created at the start of the open content movement and have fallen out of use.
A United States government work is prepared by an officer or employee of the United States government as part of that person’s official duties. It is not subject to copyright in the United States and there are no copyright restrictions on reproduction, derivative works, distribution, performance, or display of the work.
These are perhaps the earliest versions of formalized open content licenses. It has largely fallen out of popularity because it doesn’t provide the variety of options afforded by the Creative Commons licenses, which the Open Content Project now recommends.
Aimed at software, these are still relatively prominent and are part of the copyleft movement, creating works that others can use and share under the same license.
This copyleft license is designed as a response to DRM licenses, “Digital Rights Management,” which basically prohibits others from altering digital content and devices in ways not intended by creators.
This license is for… games. It grants permission to modify, copy, and redistribute portions of game content, notably game mechanics.
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See the rest of our Free Media Guide for more info on how to license, find, and make the best open content!
Creative Commons Love: EJP Photo on Flickr.com