Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.

CONV. - Convert YouTube video to MP3, GIF or MP4

Vamos - Local Event Discovery

Downie - Video download for OS X. Downie supports at this moment over 1,000 different sites.

Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Yout - YouTube to Mp3 Converter