Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Intch - Professional networking app
Event Hunt - Startups and Tech Events Curated By Locals
Upstream - Upstream MINT 2.0 is a mobile commerce platform that optimizes sourcing and localization, marketing, delivery and payments.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Cooper - A private professional network for quality intros