Upcoming.org - A simple way to share and discover interesting events
Mobilizon - A free and federated tool to get our events off Facebook
TEEM — Meet offline - People & Activities Nearby
Openki - Platform where you can search, propose, take part, help organize or publish workshops, lectures...
Togetheo - Meet people nearby, who share your interests 🌍
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.