BiSync provides full asynchronous bi-directional documents synchronization using many standard protocols.
You can use it to have consistent files between your laptop and your enterprise servers as you edit documents offline. It can also be used to synchronize ECM repositories between sites or software solutions.
Up the Sync is a basic Google docs synchronizing program written in Java. It auto-syncs every 5 minutes by default, and can run quietly in the system tray. If the user updates a document on their computer the Google docs version is also updated.