SmartMedia Pro - Smartmedia Pro Classroom Management Software allows remote-control of classrooms and virtual classroom management.
GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Class Charts - Class Charts is super fast behaviour management software, creating school seating plans in seconds.
itch.io - An online game marketplace and community.
CSE Classroom Manager - Technology for Education
Epic Games - Computer game storefront that gives 88% of revenue to developers