Jokosher is a simple yet powerful multi-track studio. With it you can create and record music, podcasts and more, all from an integrated simple environment. http://en.wikipedia.org/wiki/Jokosher

Jinzora is a Web-based media streamer, primarily designed to stream MP3s (but can be used for any media file that can stream from HTTP).

Xfmedia is a simple audio and video player based on libxine. It is designed to be fast and easy-to-use, taking up a minimum of screen real estate, while providing access to media files of all types.