From Athena IT:
Chit Chat for Facebook is a Facebook Chat Messenger that enables users to use Facebook Chat without their web-browser. The Facebook Messenger enables users to save their Facebook Chat conversations (chat history), format their instant messages (use bold and underline) and add smileys to their messages. Additionally, Chit Chat for Facebook supports the ability to send private Facebook mail and Facebook wall posts many Facebook friends at once. Chit Chat for Facebook allows users to enjoy the convenience and ease of an instant messenger whilst communicating over Facebook Chat.