Ecommerce Senders - Live email marketing insights for the top 100 Shopify stores
Growth Hacker Marketing - Ryan Holiday's book, re-released and expanded
Q-Stats - Get free marketing insights for every question on Quora.
Your Growth Hacks Aren't Working - Free new book by Steli Efti on B2B customer acquisition
Singular Marketing Analytics - Pull marketing spend into a single dashboard. No code.
GrowthHackList - 100+ curated growth hacks for makers + early stage startups