Make Thunderbird the chat powerhouse

"...Additional Chat Protocols for Thunderbird ... is a new extension for the email client by Florian Queze, one of the developers of Instantbird, that adds several new chat protocols to the email client. The extension adds support for the following instant messaging protocols on top of what Thunderbird is supporting by default: AIM, Bonjour, Gadu-Gadu, GroupWise, ICQ, MSN, MySpaceIM, Netsoul, SIMPLE, Sametime and Yahoo. The add-on uses the Pidgin library for the functionality...
"Select the account that you want to add to the email client, click on next and follow the wizard guiding you through the configuration of the chat account...."

Source: Ghacks.net

More  Make Thunderbird the chat powerhouse: add chat protocols