Music2iPod is an app that permits you to import music files, songs, videos and podcasts directly into the iPod media library. You don't anymore need iTunes to sync your files and add them to the iPod - this app's built-in file browser lets you choose any media file to be imported to the music library.
Compatible with iPhone, iPod Touch and iPad, on firmwares 5.0...6.0!
This app is free, but I kindly ask you to donate if you like it.
Developers: you can find the source code of this app on GitHub (H2CO3/Fridge) and that of its underlying iPod access support library (H2CO3/libipodimport).
See larger Screenshots below..