Mobilizon - A free and federated tool to get our events off Facebook
Meetingbird - Powerful meeting scheduling and notes — right in your calendar
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
Standuply - Run daily standup meetings and track your metrics in Slack
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Navigator - The Teamwork assistant — run great meetings without busywork