Aptoide - Aptoide is a third party replacement for the traditional Google Play Store.
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
APKMirror - Android Market and APK Downloads
Amazon Appstore - The Amazon Appstore is a place to purchase and download apps for your Android device.
Mobango - Mobango is an alternative Android market.
Samsung Kies - Samsung Kies is a freeware software solution used to communicate between Mac or Window OS and more recently Samsung smartphones and tablets.