Cydia - An alternative app store for jailbroken devices.
BuildStore - Safe and trustworthy alternative app store for iOS
iNoJB - iNoJB, formerly iNoCydia, is an amazing Cydia alternative requiring no jailbreak!
Get Mods APK - Get Mods APK offers a big collection of new and top-rated Android Mod Games, Mod Games, Premium Tools that you can download without signing up.
Hydia - Hydia is a non-jailbroken version of cydia wich allows you to customize your device in many ways.
Apple App Store - Install apps on your iDevice via the App Store.