Medibuntu

The web page Medibuntu is a useful site for getting the software necessary to use many multimedia files, including DVDs or MP3 files.

Automatix

According to the Automatix web page:

Automatix2 is a free graphical package manager for the installation, uninstallation and configuration of the most commonly requested applications in Debian based Linux operating systems. Currently supported are Ubuntu 7.04, 6.10, 6.06, Debian Etch and Mepis 6.

Our list of supported applications include a whole range of multimedia codecs, burning and ripping software, file sharing software, email clients, VoIP enabled chat clients, browsers, encryption software and a lot more!

It is easy to install things. But you may have to use a different package manager to remove or manage some of the programs.