Creative Commons Licenses

Attribution CCBY

much like the BSD license, you can use CC BY content for any use but must credit the copyright holder

Attribution ShareAlike (CC BY-SA)

a copyleft version of the Attribution license. Derived works must be shared under the same license, much like in the Free Software ideals

Attribution No-Derivs (CC BY-ND)

you may redistribute the content under the same conditions as CC-BY but may not change it

Attribution-NonCommercial (CC BY-NC)

just like CC BY, but you may not use it for commercial purposes

Attribution-NonCommercial-ShareAlike (CC-BY-NC-SA)

Builds on the CC BY-NC license but requires that your changes be shared under the same license.

Attribution-NonCommercial-No-Derivs (CC-BY-NC-ND)

You are sharing the content to be used for non commercial purposes, but people may not change the content.

No Rights Reserved (CC0)

This is the Creative Commons version of public domain.