Julie Desk - Virtual assistant using AI to schedule your meetings
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Clara - Clara is a virtual employee that schedules your meetings, getting you to the work that matters, faster.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Mastermind Manager - Software for running mastermind groups
Bigtent - BigTent is a web-based organization and communication portal for groups.