itch.io - An online game marketplace and community.
GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Ubisoft Club - Ubisoft Club app enables you to get updates about your favorite games timely.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
Humble Bundle - Buy a bundle of games, you decide the price, and support charity in the process.
Matplotlib - matplotlib is a python 2D plotting library which produces publication quality figures in a variety...