AppAddict - AppAddict is an online tool that allows you to download third-party apps on your devices without rooting or jailbreaking your devices.
Cydia - An alternative app store for jailbroken devices.
vShare - vShare is an app through which you can download apps, games, wallpapers, and ringtones for your Android and iOS devices.
Zestia - Zestia is a mobile app designed to assist you in organizing your hectic schedule, social life, and professional persona.
Mob.org - Mob.
JazzMyApp - Let JazzMyApp surprise you with amazing apps everyday. Try it out yourself.