It's a very powerful but an effective add-on for Firefox and Chrome that help connecting you to major social networks including Twitter, YouTube, Facebook, Flickr, Foursquare, etc. From your current page you can update your status, share images and links and do lots more.
Features of Yoono
* Access your updates from all social networks.
* You can update status, comment, like, send Direct Messages, etc. all without leaving your webpage.
* View your Facebook notifications, tweets, Lists, YouTube Subscriptions and much more!
* Support for multiple account set up for Twitter, Facebook and more.
* You can easily share the current page you're viewing or images, links, etc.
* You can upload photos to Facebook, Twitter and more.
Yoono is also available for iPhone, iPad, and for desktop.
Download: Yoono.