NexusFont - Choose and manage your fonts with Nexus Font.
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
Font Viewer - Font Viewer is an application which does exactly that - it views fonts!
keezy - A colorful soundboard. Play with music.
Font Manager - Simple font management for GTK+ desktop environments
Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.