F-Droid - F-Droid is an interesting alternative for Android users who want to try something different and not have to use the Goole Play store all the time.
GOG.com - DRM-free game store, selling both new and old titles. No clients required.
APK Pure - Download apk for Android with APKPure APK downloader. NoAds, Faster apk downloads and apk file update speed. Best of all, it's free
Origin - Origin is your new digital playground. It’s where you go to find the best that EA has to offer.
APKMirror - Android Market and APK Downloads
Epic Games - Computer game storefront that gives 88% of revenue to developers