What is the best remix program?

What is the best free music program to mix songs?

I like Audacity, but I have no idea what kind of things you're looking to do. :)

I'd like to make Queen remixes. I have Audacity- it's the one i've tried out but it's seems to cheep to me.

acoustica or wavepad...

acoustica only gives trial versions and barely has any features but it's easier to use. wave pad has a ton of effects and is free but it's harder to use. :D

Thanks.