doubleTwist
This is an applicatio that allows users to store, organise and sync files from a range of different devices such iPod, Blacberry and MP3 players, Camera and much more.
You can download the software application from the doubleTwist website. Go here
Once the software as downloaded to your PC, follow the installation instructions to setup. Then just plug your device in, select the syncing options, and away you go.
You can also share you files with others as well. The software is curently in public beta, and will remain free when fuly released.

You can also publish a video to YouTube, and upload photos to Flikr or privately share files.
I will give it a test myself, to see how to stands against iTunes.
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