Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
TaskBoard - A Kanban-inspired app for keeping track of things that need to get done.
Ticket Tribe - Sell tickets online with no fees per ticket
Pintask - Pintask is the most customizable Kanban board.
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
buckets.co - Feature rich kanban board collaboration platform.