System Scheduler - System Scheduler for Windows, Free Task Scheduler Software replace Microsoft Windows Task Scheduler
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
VisualCron - VisualCron is an automation, integration and task scheduling tool for Windows.
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
Freebyte Task Scheduler - Freebyte Task Scheduler, freeware for Windows and Linux/Wine.
Ticket Tribe - Sell tickets online with no fees per ticket