Buildily Academy - Learn from the best startup leaders
ASO Tools by AppFollow - Tools for App Store Optimization in App Store & Google Play
Startup School - How to start a startup, by Y Combinator
App Launch Checklist - Planning tool for launching your app successfully
Startup Toolkit - Interactive how-to guides to launch your startup
ASO Tool Box by StoreMaven - Preview & download the creatives of any app, in any country