Mobilizon - A free and federated tool to get our events off Facebook
Hive - Seamless project management and collaboration for your team.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Sup! Standup Bot - The complete stand-up and follow-up bot
DownToMeet - DownToMeet is a platform to organize, find, and attend group events.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.