AppRecs - AppRecs sorts through reviews in the App Store and automatically helps you filter out inauthentic results.
Cydia - An alternative app store for jailbroken devices.
Zestia - Zestia is a mobile app designed to assist you in organizing your hectic schedule, social life, and professional persona.
JazzMyApp - Let JazzMyApp surprise you with amazing apps everyday. Try it out yourself.
Fnd - Browse Apple App Store and iTunes on the Web
iOS Haven - A listing of tweaked apps and games for iOS devices. Install directly from the browser.