Multimedia applications for Ubuntu

Media player
The VLC player is one of the most reliable and most versatile media players available.

Installation
sudo apt-get update
sudo apt-get install vlc browser-plugin-vlc

CD Ripper
Asunder is a graphical Audio CD ripper and encoder. It can be used to save tracks from Audio CDs.

Installation
Via Synaptic Package Manager

Note for the public record: Columbo does not condone "illegal" copying of copyright-protected content, regardless of how outdated the laws on intellectual property, how unfair any "fair use" policy stated in those laws, or how inadequate legal access to your favorite music and other audio content might be in your country.

Audio editor
Audacity is a free, open source, cross-platform software for recording and editing sounds.

Installation
Via Synaptic Package Manager