ASO Tools by AppFollow - Tools for App Store Optimization in App Store & Google Play
App Launch Checklist - Planning tool for launching your app successfully
Asodesk - One solution to grow your app business
StorePreviewer - See how your app will look like on the App Store
ASO eBook by TheTool - App Store Optimization made easy
ConversionChecklist.org - A 41 point checklist to make your website convert better