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
Colorware iPhone Retro - A vintage, 80s-inspired iPhone
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.
My 2000's TV - Relive the early 2000's via this nostalgic TV simulator