iTunes Agent sits in your system tray and will automatically synchronize with iTunes. Associating with playlists is a nice feature and helps you to constantly renew the music in your playlists and in your MP3 player.
You can also have iTunes Agent recognize the file type for each device. This is particularly useful as each MP3 player usually favors a different file format.
Although the interface is fairly basic it lets you easily set up your devices and how you want them to interact with iTunes. This program is great use for anybody looking to sync MP3 players other than an iPod with iTunes.