Watch as Tanya Morgan emcees Ilyas, Donwill and Von Pea show off this new iTunes application made specifically for rappers. Freestyle combines a notepad, microphone, rhyming dictionary, and sound bank of original beats as an all-in-one app. It allows for users to write and record tracks on an iPhone or iPod Touch. There are several other videos of rappers displaying their skills at the app's YouTube page.
You can grab this app for free here (link opens to iTunes store).