Last week I found Xobni through an RSS Feed. I installed the application and passed it on to a few coworkers. After using this application for over a week and having a number of coworkers install and enjoy the tool I thought I would pass the word.
Upon installation Xobni will search through your email and create analytics based on your email use. It will then display graphs on how many emails are sent/received, who sent you the messages, times in which emails are sent, follow up delays from recipients… Just to name a few features.
There is also a toolbar that is installed in Outlook which will display quick information like the senders phone number, contacts you have in common with the sender, recent email conversations you have had, and any file attachments from that person.
This application is definitely worth a look. You can download it here.