Harmony offers integration between Microsoft Outlook and Google Docs
Harmony is a now plug-in for Microsoft Outlook that connects it with Google Docs.
It installs itself as a sidebar in Outlook application and you can connect it with your Google Docs account.
It gives you the ability to share Google Docs hosted documents through emails on Outlook. You can share documents with your colleagues through the cloud.
This plug-in is being offered as a free download for now. They plan to release an enterprise edition later this year which might feature more capabilities.
Checkout: Harmony from Mainsoft