AppAddict - AppAddict is an online tool that allows you to download third-party apps on your devices without rooting or jailbreaking your devices.
25pp - 25pp is App Store that contains exclusive apps that are not yet available on app stores.
Mob.org - Mob.
iTongPush - iTongPush is an IPA app that enables users to download and install more than 10000 apps for free.
Cydia - An alternative app store for jailbroken devices.
iNoJB - iNoJB, formerly iNoCydia, is an amazing Cydia alternative requiring no jailbreak!