Pidgin

Pidgin is an easy to use and free chat client used by millions. Connect to AIM, Google Talk, ICQ, IRC, XMPP, and more chat networks all at once.

Configuration
Pidgin's guide is a complete guide through the process of configuring every aspect of pidgin.

An  important  consideration is that Pidgin configuration files are saved in plain text, so it's recommendable to use unique passwords for the accounts or always connect without saving the password.

Usage
Pidgin comes with a GUI based on Gtk that lets you interact with different protocols and stay connected to different servers as described in the Pidgin's guide

Plugins
Pidgin has a community of third-party developed plugins. You can find out more on the third party plugins at the official wiki page.

Configuration and logs
After unmerging, for a full clean-up, be sure to remove old logs and individual user configuration files from their default location in each user's home directory:

External resources

 * FAQ (official) - A list of Frequently Asked Questions concerning Pidgin.
 * Using Pidgin (official) -Pidgin's usage and configurations.