Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
DocDroid - DocDroid is a service for sharing document and slides.
Event Hunt - Startups and Tech Events Curated By Locals
Phoesion Glow - Phoesion Glow simplifies the creation, deployment and managing of dotnet microservices, making it easy for developers of all skill levels to build and maintain complex applications.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
SlideShare - Discover, Share, and Present presentations and infographics with the world’s largest professional content sharing community.