Ninite - Ninite is the easiest way to install software.
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.
GNOME Software - A application for installing apps and updates.
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
Snap Store - An in-app shopping experience from Snapchat 🐶🔥
APKMirror - Android Market and APK Downloads