Stealthsound is an audio converter written with
Gambas. It supports tag editing/guessing, and has
a plugin system to make it support more audio file
formats. Currently, it supports MP3 decoding and
Ogg/WAV encoding, but other plugins are on the way.
lnkMusic is a powerful and easy-to-use interface
for MPD (Music Player Daemon). It features
playlist sorting and a system tray item that lets
you control MPD without having to open the main
window. The tag browser is similar to the one in
amarok with an integrated search engine.