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.
Xobni's own FAQ says that while paid customers will be supported until their contract ends, no new customers are being accepted, and downloads of Smart for Android and BlackBerry have already been stopped. Come 2 July 2014, support for those apps will cease and they're likely to stop working. The Outlook plugin is continuing for the moment, but there are no plans for an Outlook 2013 version.