Google Cloud Connect
Google recently announced their Cloud Connect service, which allows users to sync their documents with Google Docs from the Microsoft Office suite. The service keeps documents updated with the online version, which can be edited remotely from computers as well as smartphones. The coolest feature, however, is ability to collaborate with multiple users at the same time. It's like a group chat except a document is being edited in near-real time. Versions of all changes are kept so you can go back and forth without fear of losing any changes. Small businesses that cannot afford to set up Microsoft SharePoint will find the collaboration functionality a great tool.