Topia - Create amazing wallpapers for your iPhone
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Gather Town - Spatial video-chat worlds for work and play
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
VRChat - Create and play in virtual worlds with others
Bigtent - BigTent is a web-based organization and communication portal for groups.