Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform

Superpeer Channels - Beautiful livestreams with your subscribers

Ticket19 - Sell tickets for your events with minimal transaction fees.

Couchmates - Transforms your roommate into your personal couch concierge

pretix - pretix helps you to sell tickets for your event in an easy way. It supports multi-lingual events and provides a wide range of features

Cohort - Find the people you need through the people you already know