Task Scheduler - The Task Scheduler enables you to automatically perform routine tasks on a chosen computer. Task Scheduler does this by monitoring whatever criteria you choose (referred to as triggers) and then executing the tasks when their criteria are met.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
System Scheduler - System Scheduler for Windows, Free Task Scheduler Software replace Microsoft Windows Task Scheduler
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
RoboIntern - An automation and scheduling software with focus on repetitive office tasks.
Ticket Tribe - Sell tickets online with no fees per ticket