fangr.am - Building communities for creators
Meetabit - All the local tech and startup meetups in one place - easy to organize & attend
Patreon - Patreon enables fans to give ongoing support to their favorite creators.
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
Ensemble.Chat - Turn your Fans into Recurring Customers
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.