Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Schedule Share - Create and share read-only calendars
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Gong - Gong uses AI to analyze spoken conversations from audio sources and web conferencing platforms such as Cisco WebEx, GoTo Meeting and Zoom.
Bigtent - BigTent is a web-based organization and communication portal for groups.
Ddays - Plan events with friends without the back and forth messages