AppAddict - AppAddict is an online tool that allows you to download third-party apps on your devices without rooting or jailbreaking your devices.
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
vShare - vShare is an app through which you can download apps, games, wallpapers, and ringtones for your Android and iOS devices.
APKMirror - Android Market and APK Downloads
Mob.org - Mob.
Mobango - Mobango is an alternative Android market.