OStatic

Pidgin is a great GTK2-based instant messenger application that supports a bevy of protocols, including ICQ, Yahoo!, MSN, Jabber, and AIM. It's a terrific app in its own right, but when you add some of these power tools, Pidgin is even better.

pidgin-hotkeys - Use this plugin to assign global hotkeys to quickly perform regular tasks like fetching messages, toggling the buddy list, or opening the preferences pane. Also available in German and Swedish.

If you spend a lot of time online then you know how quickly passwords and registration information can pile up. It's practically impossible to remember them all, but thanks to open source password manager KeePass you don't have to. It's developed for Windows, but there are several unofficial contributed builds for Linux, Mac OS X, BlackBerry, Android, and more.