Image licensing Guide and resources and information on creative commons licensing
Here are some links to pertinent information regarding different types of licenses:
1. Free Art License - I didn't go over this license, but its a copyleft license.The Free Art License grants the right to freely copy, distribute, and transform creative works without infringing the author’s rights.
2. Different Creative Commons Licenses. -- Different CC licenses.
3. Creative Commons Zero License. -- Creative commons zero license.
4. Library of Congress
Remember most photography produced under the government under government work hours and pay are public domain and cannot be copyrighted although exceptions may apply.
5. Model Release Information.