Pidgin is Free
Pidgin is free software. Pidgin is released under the GNU General Public License for use by anyone.
Pidgin Connects Everyone!
Pidgin supports dozens of chat networks. Connect to AIM, MSN, Google Talk, or Yahoo without any other instant messenger clients.
Install Third Party Plugins
If Pidgin doesn't have a feature already, then install a third party plugin for features like encryption, spam protection, and additional chat protocols.
Pidgin has one of the largest open source support communities so you can get help easily.