Creative Commons licenses:
Designed for people who create and publish something that they're happy to have copied freely, but if anyone wants to use the work for profit, the copyright holder has to give their permission (which may of course include requesting a cut of the profits).

Often used by performers who publish MP3s of their music on the net.
"You can copy this as much as you like, but if anyone makes money out of it I want a slice of the action!"

See http://creativecommons.org

Anahata