Logology - Get a designer-quality logo for your startup in 5 minutes.
projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
LogoFreeway - Logo Creator / Logo Maker
Magic Music Visuals - Fully-customizable and highly responsive visuals for live and recorded audio & MIDI.
My Brand New Logo - Create your own professionally designed logo in 30 seconds. For freelancers, start-ups and other companies.
Kauna - Kauna is a music visualizer. Kauna renders any sound reproduction in system.