Chocolatey - The sane way to manage software on Windows.
itch.io - An online game marketplace and community.
Ubisoft Club - Ubisoft Club app enables you to get updates about your favorite games timely.
GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Ninite - Ninite is the easiest way to install software.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.