If you have an Apple iPod and running Ubuntu on your computer, the following 2 applications that are readily available in the Ubuntu Software Center should be of interest to you.
GTKpod iPod Manager
Using GTK2, it allows you to upload songs and playlists to your iPod with support for ID3 tag editing. It also supports multiple charsets for ID3 tags, detects duplicate songs and allows offline modification of the database with later synchronisation.
GPixPod iPod management tool
GPixPod is an application for organizing photos and photo albums on your iPod. It also helps you modify manually the elements in the photo database of your iPod as compared to the iTunes syncing only method.
These are by no means the only iPod management tools available for Ubuntu, but are a simple and easy to use applications for everyday.