Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
SkillMint - Find, meet and rate people with common skills and interests. Community-driven rating system.
Event Hunt - Startups and Tech Events Curated By Locals
TeamSnap - Sports Team, Club & League Management Software & Apps
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Fanatics - Fanatics is the leading online retailer of officially licensed sports merchandise!