ASO Tools by AppFollow - Tools for App Store Optimization in App Store & Google Play
iOSGODS! - iOSGODS!
App Launch Checklist - Planning tool for launching your app successfully
5play.ru - 5play.ru enables you to download highly-rated Apps and Games for Android devices.
StorePreviewer - See how your app will look like on the App Store
Altstore - A home for apps that push the boundaries on iOS