MP3
Amazon Loves Linux Music Lovers
Amazon treats Linux users like 1st class citizens
MP3Gainer - Apply ReplayGain to your entire music library
Volume normalise an entire MP3 library the right way
Mediatomb 0.12 - Streaming audio and video around the house
In home streaming via UPnP with Mediatomb
Cheap and Cheerful MP3 Player
Cheap as chips MP3 player upgrade
Pocket Entertainment
Using an iPAQ 4150 PocketPC for games & music