If you are puzzled by the subject, Xobni is Inbox spelt backwards. It’s a brilliant plug-in for Microsoft Outlook that makes a crap program better. Once installed it adds a toolbar on the side of your Outlook page and the toolbar offers a wealth of information FAST.
You have access to contact details, telephone details, who this person is linked too, links to all attachments in the related emails, previous conversation (similar to Gmail) all in quick and easily accessible toolbar.