From Facebook Chat IM:
Facebook Chat IM is a free and open source Instant Messenger for Facebook, with it you can chat with all your Facebook friends directly from your Desktop without the need to be logged on to Facebook, so you can chat with your friends while surfing the Web, watching a movie or even when working. It's simple and convenient to use and offers many great features such as emoticons for Facebook, status update notification, sound alerts, chat history and much more. With Facebook Chat IM you'll never miss a friend and you'll have more fun while talking to them.
What's new in this version:
Version 1.1 fixed reported bug that caused client to be unresponsive under certain conditions