The Product Folks - A volunteer-led community of product managers and makers
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Basecamp Personal - Manage all your small projects for free
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
Basecamp - A simple and elegant project management system.
Ticket Tribe - Sell tickets online with no fees per ticket