Planable.io - Planable is the command center of social media campaigns trusted by agencies, freelancers, and marketing teams, that allows you to easily create, collaborate, get approval and schedule posts for your social media campaigns.
SwipeWell - The only tool dedicated to helping you save, organize, and reference marketing examples (so you never feel stumped).
Bootstrap Money - How much money can you make selling software?
AppGrowthLab (by SplitMetrics) - 55 app growth lessons from 30 app marketing experts
birb - birb — rentals browser, designed for London.
Marketing Examples - A gallery of real world marketing case studies. Updated every day.