SharedPod is a cool little app that you can use to manage your music and videos without using iTunes.
SharePod is a lightweight music management program for your iPod. You can copy music and videos between your iPod and computers usually without having to install anything on the computer. The good part is that since version SharePod 3.8.4 Beta2 the iPhone and iPod Touch are supported.

This means that you no longer will need to use iTunes to copy your music and video’s. sharePod allows you to add, remove music, videos, playlists and artwork. Backup all your music and import them easily into your iTunes Library.
Another great feature is the fact that sharePod is ultra portible. It only consists of 1 executable and it doesn’t need installation. You can just run it from a usb stick!
To use the app, you will need to have the iTunes installed!

Download sharepod from here.