GTK+ comic book viewer.
Internet radio directory browser
music composition and notation software, audio to midi converter
The best collection of tools for MLB.com content and MLB.TV for Linux.
A full featured cross-platform image library
See mlbviewer project for MiLB.tv support
Very Powerfull Crossplatform Qt Based Music Note Editor[Still Planing]
A plugin for the Sonata mpd music client to download album art.