GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Geforce Now - Underpowered PC can now pack the punch of high-performance GeForce GTX GPUs with GeForce NOW.
itch.io - An online game marketplace and community.
Parsec - Streams games locally or over the internet
Epic Games - Computer game storefront that gives 88% of revenue to developers
Shadow - Transform any device into a supercharged gaming machine.