Guestboard - Lead powerfully-organized group events with Guestboard – a modular event platform that gives groups of 10-1000+ people a central space to coordinate, build excitement, and save money. No more crazy email threads. No more massive group texts.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Creativity 365 - Cross-device content creation suite
Mobilizon - A free and federated tool to get our events off Facebook
Microsoft Teams - Microsoft Teams provides the enterprise-level security, compliance and management features you expect from Office 365, including broad support for compliance standards, and eDiscovery and legal hold for channels, chats, and files.