Up the Sync is a simple and easy to use one way document synchronising program for Google docs. Designed so that copies of documents on your computer are kept up to date on Google docs.
List, view, search, rename, delete, or create new documents in Google Docs.
OffiSync: a Microsoft Office extension to integrate Microsoft Office with Google Docs and Google Apps
OffiSync Supercharges Microsoft Office, enabling users to significantly improve the way they create, collaborate and share their documents by integrating Microsoft Office with Google Docs, and Google Apps.