Mobilizon - A free and federated tool to get our events off Facebook
Slack - A messaging app for teams who see through the Earth!
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
Yac - Take your time back from Zoom & Slack
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Fibery - Work management platform that adapts to companies and grows with them.