Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Vimeo - Vimeo is a social media app that lets you share and capture videos. You can watch new videos in a variety of different categories, and you can share your own content right from your device. Read more about Vimeo.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Wistia - Host, manage, and track your videos with the best video marketing tools in the (known) universe.
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.
Kaltura - Video solutions for media, service providers, enterprises, and education - OTT TV, Webcasting, Enterprise YouTube, VPaaS – live and VOD.