1: Floola
Floola isn’t an open source application, but it does run on Linux (as well was OS X and Windows). Floola takes music management (in particular, synching iPods) one step further. With this nifty application, you can download and convert YouTube videos for playback on your iPod. But unlike some other clunkier applications, Floola does this seamlessly and simply. No commands to enter; it’s all GUI. The only possible gotcha is that before you can add videos from YouTube, you have to install ffmpeg on your Linux box. Floola uses ffmpeg for the conversion process.
Don’t expect Floola to have all the bells and whistles that iTunes has. Floola offers Photo support, Snarl (Windows only) support, Growl (Mac only) support, Notes, repair iPods, export lists to HTML, language support, lyrics, duplicate and lost file search, artwork support, video support, Google calendar support, playlists, podcast, lastfm support, and more. Floola is simple to use in Linux, as it comes in an executable binary that you can simply copy to the /usr/bin directory and run with the commandFloola.

