Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
SurfersList - The ultimate online solution for finding, buying, and selling new and used surf equipment.
Patook - Platonic Friend Making and Community App
Fanatics - Fanatics is the leading online retailer of officially licensed sports merchandise!
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
Wooter - Marketplace for sports & activities