SaaS Email Marketing Handbook - Double Your MRR With Email Marketing
Vero Newsletters - The first "baseless" email marketing tool.
HubSpot Free Email Marketing - Powerful drag and drop email marketing in the HubSpot CRM
Elevatr Email Marketing Automation - Fast and easy email marketing software
Google Sheets Email Marketing - Email automation and validations directly from Google Sheets
Grade My Email - Helps you get out of the spam folder.