bf.iMessages is a Scripts software developed by bf.collaboration. After our trial and test, the software is proved to be official, secure and free. Here is the official description for bf.iMessages:

The only HTML based instant messaging solution available today that works through any HTTP allowing firewall and requires no screen refreshes.

Why not just use AOL Instant Messenger?
First, with bf.iMessages there is no application to install, so you can use bf.iMessages from any computer. Plus, bf.collaboration's iMessages uses the HTTP port, so unlike AOL IM (or Yahoo Messenger), it can work through your corporate firewall.

Key features

HTML based, but real-time with no constant screen refreshes. Emoticons
Turn sounds on or off. Automatic emoticon conversion.
Save and retrieve transcrips. iMessages stored using bf.collaboration's variable length key encryption Algorithm.