Kadu

Kadu is a small, but comprehensive application that enables you to carry out conversations with your friends and transfers photos or files in real time.

Includes extensive customization options

It is necessary to mention that upon first launch the application takes you through a wizard, so you can easily set up your profile and account without too much hassle. More precisely, you can select the nickname and preferred language, specify the network for the account you want to set up and configure it. You should know that you can make modifications to these settings any time by accessing the Preferences window.
Speaking of the Preferences window, the program comes with several default themes so you can change the appearance of the icons, chat and buddies list, for instance. In addition, you can alter the colors for the text and backgrounds of the chat window as well as use custom font styles.
You can also specify the behavior of the application in various situations, a feature that is more than welcomed in an instant messenger. For example, you can select the interval when the app should switch your status to invisible or offline and display detailed buddy information in your list.

Comes with numerous plugins that can enhance your experience

Even though the program has some of them already installed, you should keep in mind that you can search for and install extra plugins that can make the IM client more convenient to use. In case you are unfamiliar or want to learn more about the extensions, simply click on the help button or check out the details on the program's website.
The plugins are neatly organized into categories within the app's Preferences window, so you can find and compare the ones listed for similar classifications – such as sound, status, desktop or media players for instance – without too much hassle.

A nice IM tool you can customize according to your preferences

All in all, Kadu is an application that comes with numerous options that allows you to personalize and enhance your conversations with your friends over a stable XMPP or Jabber protocol instant messenger.