Magic Music Visuals - Fully-customizable and highly responsive visuals for live and recorded audio & MIDI.
2016bestnine - Your best nine Instagram pics from 2016
projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
The Twayback Machine - View your friends' old tweets for fun and trolling
Kauna - Kauna is a music visualizer. Kauna renders any sound reproduction in system.
PastBook - PastBook is an online service that allows you to create your own beautiful photobooks and share them with friends and family.