Email Marketing: A Beginner's Guide - Master email marketing with these 3 short ebooks from Drip.
Job Promotion Course - Step-by-step promotion guide in a free 7-day email course
HubSpot Free Email Marketing - Powerful drag and drop email marketing in the HubSpot CRM
Upcado - Super easy to use Messenger Marketing tool for your business
Google Sheets Email Marketing - Email automation and validations directly from Google Sheets
Olyo - Direct marketing via Facebook Messenger