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