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.
vdNote - Share noteworthy moments from YouTube videos.
Vamos - Local Event Discovery
YouDict - YouTube dictionary to search words, expressions & names
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Summary Panda - Remove annoying 'blah blah blah' parts of YouTube videos.