SkillMint - Find, meet and rate people with common skills and interests. Community-driven rating system.
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
Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.