Mixed In Key

MetaBliss

Paid

ID3 tag editor that will help you clean up your meta-data.

iMashup - Mashup Remix App

Paid

Professional-quality remixing app: Create your own mashups and remixes. Experiment with your favorite music, and discover combinations that sound...

Mixed In Key Mashup

Paid

MASHUP is part of the "Explore Your Creativity" apps recommended by Apple.