mix mp3s

This is a great tool to mix mp3s with, especially if you don't have $400-600 for final scratch pro. It was designed specifically for DJing live and works like a virtual turntable. Besides being free, it's far better than most of the other toy-ish mixing programs available. Having two soundcards makes things easier, but it can even run on a system with one soundcard (although you still need a real mixer). We've come a long way since this.