GImageView is a GTK+ based image viewer which supports tabbed browsing, thumbnail table views, directory tree views and drag and drop. It also support movies using the Xine library and MPlayer, and supports images in compressed archive formats.
Moyn (Music on your network) is a music player that plays files from a HTTP server. A home web server is a natural solution to sharing music files, so it's only fitting that a player is written with that in mind.
A remotely administered jukebox server (written in Ruby) with the ability to output to a local device or to a stream. Administration is via XMLRPCfrom any number of sources but a web interface is included.