A very nice desktop application AlertThingy which runs on Adobe Air that update your latest updates from your favourite social networks direct to your desktop. Send Tweets, update your Facebook status, upload photos to Flickr, post to Tumblr and more.
It can also utilize by business users because it is integrated with Yammer, Basecamp and Huddle. Also you get the RSS reader for share news item with your friends.
Take control of your life streams; With so much data it can be easily withstand information overload. It provides a simple filtering system that allows you to make the data you’re most interested in visual. Also it quickly add all of your friends and contacts from different networks through the Contacts list. Easily create groups of contacts to see only alerts relating to them.