Iris - The fastest web framework for Go in (THIS) earth
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Citizen - Stay safe with instant alerts about nearby crime
Event Hunt - Startups and Tech Events Curated By Locals
Guardians - A safety app for women
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets