Xilisoft iPod Rip lets you synchronize contents between an iPod/iPhone and your computer in both ways, including music and video.
Transfers in Xilisoft iPod Rip are easy to do and also instantaneous, syncing content in the very moment you add files or folders to the list. They can also be done in batches, though the trial version has some limitations in this area.
On the downside, Xilisoft iPod Rip is obviously not the same as iTunes, so it doesn't support podcasts, or ringtones to name a few. I specially missed ratings and even more Cover Flow, to which I'm addicted after having spent a whole weekend downloading covers for all my albums so that they look nice on iTunes. At least Xilisoft iPod Rip does support playlists!
In any case, Xilisoft iPod Rip is a really handy solution if you're looking for a quick, easy way to copy files from the iPod/iPhone to your computer. If you need a complete music organizer, you'd better stick to iTunes.