SwipeWell - The only tool dedicated to helping you save, organize, and reference marketing examples (so you never feel stumped).
AppGrowthLab (by SplitMetrics) - 55 app growth lessons from 30 app marketing experts
200+ Growth Marketing Resources - Master Growth Marketing with 200+ Growth Marketing Resources
Growth Tower App Analysis - Top 500 US iOS apps & ASO analysis
Marketing Examples - A gallery of real world marketing case studies. Updated every day.
Growth.Design Case Studies - Product tips… in a comic book format