Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
HeySpace - HeySpace is the only free task and simple project management software with communication and collaboration feature.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Flow - Stop managing projects from your inbox.
Bigtent - BigTent is a web-based organization and communication portal for groups.
Miro - Scalable, secure, cross-device and enterprise-ready team collaboration tool for distributed teams. Join 2M+ users & 8000+ teams from around the world.