I'm pretty sure most of you already know what is Xfire and how much useful this tool can be, but for those who don't, I strongly recommend to get it at www.xfire.com.
But first of all; what the hell is Xfire? It's a tool that, when playing a game, records the hours you are spending to make a summary of your ''most played games''. It can also be used to chat (writing or voice), to join and create servers and to download files such as demos.
My Xfire: sevignator