Yahoo has acquired Xobni, makers of our favourite productivity-boosting Outlook plugin and our favourite address book app for Android, Smartr Contacts. The outcome? You'll be able to use those products for another year but not beyond.

iOS: Contact management service Xobni launched its downloadable tool, Smartr, for Android and Gmail in September. Now an iPhone version of the same tool is available, letting iPhone users synchronise with Xobni, download contact information from their social networks, and easily search contacts based on any snippet of data they have about them.

Firefox/Chrome: Gmail's address book is nice, but isn't mind-blowing. Free extension Xobni automatically grabs info about your contacts from the web and puts tons of information right in Gmail's sidebar, including relationship history, mutual contacts, and even a photo.

Windows only: Our favourite Outlook plug-in, Xobni, has left its year-long beta and updated with significant performance improvements. As a key component in our top 10 Outlook boosters, we're thrilled to see Xobni join the post-beta world.

Windows only: Previously mentioned free Microsoft Outlook plug-in Xobni is a must-have for anyone looking to get more from Outlook, and today the plug-in gets even better. That's because Xobni now integrates Facebook, Yahoo Mail, Skype, and Hoover company profiles directly in the Xobni sidebar (you can see each new feature in action in the video above). If you use even one of these services, the new integration is very convenient. If you've given the new tool a try, share your thoughts in the comments. Xobni