Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.
Postman - The Collaboration Platform for API Development