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
Battle of the Brands - Compare the online awareness of 2 brands in a battle
RocketAPK - See related links to what you are looking for.
Retro App Store - How App Store would look like if it was launched in 80s
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.
MacMenuBar - A curated directory of 200+ Mac menu bar apps