Content Marketing Stack - A curated directory of content marketing resources
SwipeWell - The only tool dedicated to helping you save, organize, and reference marketing examples (so you never feel stumped).
Top Instagram Influencers Ranking - Curated directory of Instagram bloggers by country&category
AppGrowthLab (by SplitMetrics) - 55 app growth lessons from 30 app marketing experts
Startup Stash - A curated directory of 400 resources & tools for startups
Marketing Examples - A gallery of real world marketing case studies. Updated every day.