AppSales - Find the best Android apps and games from Google Play that are currently discounted or free for a limited time
Cydia - An alternative app store for jailbroken devices.
Fnd - Browse Apple App Store and iTunes on the Web
Zestia - Zestia is a mobile app designed to assist you in organizing your hectic schedule, social life, and professional persona.
TheAppStore.org - Find apps by rating, price, category, updated date and more
JazzMyApp - Let JazzMyApp surprise you with amazing apps everyday. Try it out yourself.