Feedback Fish - Collect feedback & make your customers happy.
App Launch Checklist - Planning tool for launching your app successfully
productboard - Beautiful and powerful product management.
ASO Tools by AppFollow - Tools for App Store Optimization in App Store & Google Play
Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.
ConversionChecklist.org - A 41 point checklist to make your website convert better