CopyTrans Manager the free Alternative to iTunes has been updated recently. It now supports the management of duplicate files on iPod, iPhone and iPad. Meaning that if you're going to add music to your iPhone, CopyTrans Manager recognizes already existing tracks and won't add them once again.
If you've already got duplicate files on your iPhone, you can easily show and delete them. Therefore just push the right mouse button in the main track-list and choose "Show duplicates". This way you can easily delete all duplicate songs, videos etc. from your iDevice.
It's been (again) quite some time since I've updated this blog.
Recently, I've been moving all of my iPods (Shuffle and iPod Touch) to CopyTrans Manager. I use it on a day-to-day basis and really don't even realize I've not started iTunes in so long... I therefore forget to post here. Sorry.