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.

TidyHQ - Organization management tool to support membership, subscriptions, event planning, and outreach.

Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.

Mobilizon - A free and federated tool to get our events off Facebook

Membee - Membee is web-based membership management software.