GNU xhippo is a simple GTK-based playlist manager, designed to play music using mpg123, xmp, or most other commandline-based players while providing a friendly, clean X interface. It is localised in both English and German. Its interface is based upon the Amiga program HippoPlayer. It supports drag-and-drop, has optional GNOME support, and has a simple text-based playlist format compatible with many other players.
rawdog is a feed aggregator capable of producing a personal "river of news" or a public "planet" page. It supports all common feed formats, including all versions of RSS and Atom. By default, it is run from cron, collects articles from a number of feeds, and generates a static HTML page listing the newest articles in date order. It supports per-feed customizable update times, and uses ETags, Last-Modified, gzip compression, and RFC3229+feed to minimize network bandwidth usage. Its behavior is highly customizable using plugins written in Python.
Potamus is a lightweight GTK+-based audio player with a simple interface and an emphasis on high audio quality. It tries to make it as easy as possible to use your file manager to locate and play music. Potamus can play a wide range of audio formats, works with ALSA, JACK,and other audio systems, and supports 24-bit audio and gapless playback.