GOG.com - DRM-free game store, selling both new and old titles. No clients required.
itch.io - An online game marketplace and community.
Origin - Origin is your new digital playground. It’s where you go to find the best that EA has to offer.
Oneplay - Buy and Rent PC &MAC games
GOG Galaxy - Truly gamer friendly, DRM-free online gaming platform.
Green Man Gaming - A digital distributor for video games.