HubSpot Free Email Marketing - Powerful drag and drop email marketing in the HubSpot CRM
Really Good Emails - A large collection of good product email design.
Google Sheets Email Marketing - Email automation and validations directly from Google Sheets
Email Kick - Email designer and analytics for your transactional emails.
SaaS Email Marketing Handbook - Double Your MRR With Email Marketing
Stripo - Stripo is an all-in-one email design platform. We enable our clients to build emails of any complexity, including interactive AMP emails, really fast and easy.