Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
GetStream.io - APIs for the development of scalable newsfeeds and chat applications.
TechEvents.co - Tech and startup events aggregator
Roomkey - Gamified social network for virtual events
Facebook Local - Discover places to go and events happening near you
BeHuman.Online - A more friendly and intuitive approach to virtual events. BeHuman.Online offers personalized virtual lounges and custom branding for an authentic event experience.