Xobni, which makes a free Microsoft Outlook plug-in that helps you manage your inbox, has launched the Xobni Gadget Store. If you already have Xobni installed, you can visit the store and download 'gadgets' from a variety of services, including Facebook, Twitter, and LinkedIn.  Then, you can access content from your accounts--think Facebook and Twitter status updates--right in Outlook.

The store features a slew of business-friendly gadgets, including one from Dropbox, which lets you browse and share Dropbox files from Outlook, and Evernote, which lets you take notes on your Xobni contacts, browse notes, and associate them with a contact. The store also features a variety of gadgets for collaboration, including Salesforce Chatter, Huddle, and Yammer. 

Another plus? Most of the gadgets are free, although you'll need a subscription to paid services, such as Salesforce, for those add-ons to work.