Mitch - The unofficial mobile app for itch.io
G2A - Enjoy the vast offer of Steam, Origin, Uplay, Battle.net, GOG, PSN and XBOX CD-Keys at the most attractive prices on the market. Don’t overpay – buy cheap on G2A.COM!
GameDatum.com - A platfrom of free online games. A list of all the available online free games from various producers online.
Green Man Gaming - A digital distributor for video games.
ScienceGameCenter - The goal of the Science Game Center is to demonstrate to teachers, scientists, museums, and parents the myriad ways games can be used to improve education in math and science.
GOG.com - DRM-free game store, selling both new and old titles. No clients required.