If you find desktop application to chat on Facebook then you can try ftalk, free desktop application to chat with all your Facebook friends. After sign in you will see list of all the online Facebook friends and friends that is not online. Tray notifications at right-side bottom of your screen are also given if a friend comes online.
Except for chatting, you can upload your Facebook status directly through fTalk window. You can also visit profile pages, make comments and all other Facebook activities without visiting Facebook website. All your Facebook actions and chatting can be done directly using fTalk.
Credit: ftalk.com
To use this application is simple, just download and install then login using your Facebook username and account
If you are Facebook fans then this freeware is for you :)