Double - Tinder for double dates
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Google Sign-In - Google Sign-In is a secure authentication system that enables users to sign in with their Google accounts.
Event Hunt - Startups and Tech Events Curated By Locals
Facebook Login - Facebook Login is a secure, fast and convenient way for people to log into your app or website.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets