Regpack is an online payment software that allows businesses to collect and manage client data and payments from a secure back end dashboard. Email communication, integrated payments, recurring billing, reporting, and analytics are built-in. Regpack makes it easy to manage and charge clients securely with your team and embeds on your website for a seamless process.
Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Quake - Quake is a series of first-person shooter video games released by id Software.
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.
Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.