AppMockUp - Create the most compelling screenshots for your app.
ASO Tools by AppFollow - Tools for App Store Optimization in App Store & Google Play
iOSaprovall - Your app got rejected by Apple? We can fix it.
App Launch Checklist - Planning tool for launching your app successfully
ASO Tool Box by StoreMaven - Preview & download the creatives of any app, in any country
App Store Launch Stories - A podcast about the stories behind app launches