iNoJB - iNoJB, formerly iNoCydia, is an amazing Cydia alternative requiring no jailbreak!
5play.ru - 5play.ru enables you to download highly-rated Apps and Games for Android devices.
Cydia - An alternative app store for jailbroken devices.
iOSGODS! - iOSGODS!
BuildStore - Safe and trustworthy alternative app store for iOS
Altstore - A home for apps that push the boundaries on iOS