GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Preferred Patron - Preferred Patron is the top Customer Loyalty Software Program for businesses in any industry of any size.
itch.io - An online game marketplace and community.
Annex Cloud - Reward customers for completing traditional actions such as purchasing, as well as for taking...
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
Five Stars - Discover millions of rewards from thousands of local businesses.