Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
LOKRRROOM - A professional networking platform for athletes & sponsors
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Slive - All the live events at your fingertips
Bigtent - BigTent is a web-based organization and communication portal for groups.
The Startup Playbook - How-to guide for building your startup from the ground up