SwipeWell - The only tool dedicated to helping you save, organize, and reference marketing examples (so you never feel stumped).
GrowthHackList - 100+ curated growth hacks for makers + early stage startups
AppGrowthLab (by SplitMetrics) - 55 app growth lessons from 30 app marketing experts
Content Marketing Stack - A curated directory of content marketing resources
Growth.Design Case Studies - Product tips… in a comic book format
Growth Hacking Sourcebook - The ultimate growth hacking sourcebook