GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Playeasy - An online marketplace for finding & booking athletic space.
itch.io - An online game marketplace and community.
AthleteMinder - Mental fitness, mindfulness, and brain training for athletes
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
Coach Parry Training Platform - Online training app to help you achieve your athletic goals