myTuneSync for Windows

Simply put, myTuneSync keeps all of your iTunes music and video files in sync across all of your computers. Plus, myTuneSync has: Automatic syncing (can run daily, weekly or monthly), Password security (to keep your library safe), Sharing of a single playlist or your whole library, Custom filtering (to copy only the tracks you want), Bonjour networking (to make connecting a snap) and Macs and PCs are supported and work together.