CC BY

"Attribution This license lets others distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation. This is the most accommodating of licenses offered, in terms of what others can do with your works licensed under Attribution."

This licence is good for sharing your stuff and giving other people lots of ways that they can change it, while still getting the credit for the original.

http://creativecommons.org/about/licenses/