Messenger software for my PCs?

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i have a lot of friends. I usually contact with them using messenger and social networks. All of them have a various messenger and so i must install a lot of messenger in my PC (Yahoo messenger, MSN messenger, Facebook Chat, Twitter and Skype). Installing all of those software in my PC made my dekstop screen fully of messenger layout and i think this is very disturbing. Any idea what kind of messenger should i install which can be connect to all of them in just single software?