Comment 3 for bug 259793

Several options:
"Exchange messages with friends, family, and colleagues online."
"Pidgen lets you talk online and in real-time with friends and family."
"Pidgen is easy to use free chat software used by millions"

Or from pidgin's website:
"A free chat client used by millions. Connect easily to MSN, Google Talk, Yahoo, AIM and other chat networks all at once."

Or

Instant message all your friends in one place.

Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once.

Supported chat networks:

    * AIM
    * Bonjour
    * Gadu-Gadu
    * Google Talk
    * Groupwise
    * ICQ
    * IRC
    * MSN
    * MySpaceIM
    * QQ
    * SILC
    * SIMPLE
    * Sametime
    * XMPP
    * Yahoo!
    * Zephyr