Growth Hacker Marketing - Ryan Holiday's book, re-released and expanded
Ecommerce Senders - Live email marketing insights for the top 100 Shopify stores
TweetFavy - The Growth Hacking Tool for Twitter. Marketing automation software / Growth Hacking tool designed to grow your social media influence and attract real, targeted and engaged Twitter followers.
Q-Stats - Get free marketing insights for every question on Quora.
Primer - CSS toolkit and guidelines that power GitHub
Pulley - Cap table platform for hyper-growth startups