GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Treehouse - Treehouse is an award-winning online platform that teaches people how to code.
itch.io - An online game marketplace and community.
Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.