HubSpot Free Email Marketing - Powerful drag and drop email marketing in the HubSpot CRM
Growth Hack World - Together We Rise
Email Marketing: A Beginner's Guide - Master email marketing with these 3 short ebooks from Drip.
Grow my SaaS - Database of 150+ growth and conversion strategies
Email Marketing Academy from MailerLite - Learning platform for email marketing expert certification
GrowthHackList - 100+ curated growth hacks for makers + early stage startups