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20 Free Microsoft Office Add-Ins

Add-Ins for Collaboration and Sharing for Google Docs (2007/2010) provides a sidebar in Outlook, letting you access, create, and manage documents stored on your free Google Docs account. It aids in collaboration of sharing and editing documents, and features drag-and-drop access in their native file formats. For example, dragging an original Google Document to your computer will automatically convert to your preferred format, such as MS Office. It can also automatically convert any MS Office Document into the Google Document format when uploading to Google Docs.

Since you can share via the sidebar among your team, it can reduce the amount of attachments you’ll have to send via email—which can be insecure if using unencrypted POP3, IMAP, and SMTP.

OffiSync (2003/2007/2010)

OffiSync installs a toolbar and provides similar functionality to You can access, create, and manage documents stored on your free Google Docs account. The main difference between the two is the interface. OffiSync provides shortcuts in Word, Excel, and PowerPoint via a new toolbar.

It features intergraded Google Web and Image search with easy insertion into your document. However, it doesn’t let you save files in the native office format with the free edition.

Storage (2000 and later)

Since we're in the age of the Cloud, this app let’s you save, share, and access your documents on popular storage services directly from the Office apps. Windows Live SkyDrive, Facebook Docs, Twitter, Google Docs, DropBox,, and Slideshare are all currently supported.

This is great if you regularly use cloud storage or you need to share or collaborate. Microsoft included support for Windows Live SkyDrive access in Office 2010, but this gives you more service choices.

Google Calendar Sync (2003/2007/2010)

This add-in gives you the ability to synchronize your Google Calendar and Microsoft Outlook Calendar. You can sync events and any reminder with your desired direction and frequency. One great benefit of using or syncing with Google Calendar is you can share it with specific people, the public, or embed on a web page. This can be very useful to keep up-to-date on happenings in families, businesses, and organizations.