Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Exist - Track everything in one place, understand your life.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Zenobase - Zenobase helps store and visualize data.
Bigtent - BigTent is a web-based organization and communication portal for groups.
Arc App - AI powered location tracker