projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
VJmachine - Music Visualizer - Make a VJ show like a PRO. Music visualizer for a unique tight symbiosis of sound and video.
Magic Music Visuals - Fully-customizable and highly responsive visuals for live and recorded audio & MIDI.
Smash Notes - Smash Notes is podcast summaries you can learn from. Create all your summaries on Smash and then distribute them anywhere on social media in one easy step. Even embed it on your podcast website!
Kauna - Kauna is a music visualizer. Kauna renders any sound reproduction in system.
Slid - Capture knowledge from online videos, courses, and webinars