Envite - An integrated social chat for your e-commerce site
CONV. - Convert YouTube video to MP3, GIF or MP4
Knowledge Commons by UNESCO MGIEP - Social network for social change
Downie - Video download for OS X. Downie supports at this moment over 1,000 different sites.
Ejimoo - Minimal Social Platform. No Comments. Self-confidence gained
Yout - YouTube to Mp3 Converter