DVD Burning software

Does anyone know of any good software I can get online? I know about Nero, but whenever I d/l the trial even, it asks for a serial number. Can someone point me to a program where this isn't necessary?

Vitamin X

Integral Poster
I just use DVD Decrypter. It's free (open source) and then you can also use DVD Shrink if a DVD's image file is too big. Google it.