For quite some years GPL exists. But that was meant for code, and programs. So since a while a sort of GPL trade-off, called creative commons was brought to life. It has proven to work so well, that a CD with very popular has been released. The WIRED CD: Rip. Sample. Mash. Share. | Creative CommonsThese musicians are saying that true creativity needs to be open, fluid, and alive. When it comes to copyright, they are pro-choice. Here are 16 songs that encourage people to play with their tunes, not just play them.