Amazon Appstore - The Amazon Appstore is a place to purchase and download apps for your Android device.
AppAddict - AppAddict is an online tool that allows you to download third-party apps on your devices without rooting or jailbreaking your devices.
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.
vShare - vShare is an app through which you can download apps, games, wallpapers, and ringtones for your Android and iOS devices.
Aptoide - Aptoide is a third party replacement for the traditional Google Play Store.
Mob.org - Mob.