Topvisor - All in one SEO and PPC tools for better marketing.
Growth Hacker Marketing - Ryan Holiday's book, re-released and expanded
Master of Letters Podcast - Learn what others are doing to drive traffic to their site
Your Growth Hacks Aren't Working - Free new book by Steli Efti on B2B customer acquisition
Moz Pro - Moz Pro is a PRO version that offers a complete SEO toolset that improves search engine ranking and visibility.
Spacedoo - Short actionable marketing hacks