EmailDojo - An arena for all your email experimentation by Netcorecloud.
Really Good Emails - A large collection of good product email design.
Archbee.io - Archbee is a developer-focused product docs tool for your team. Build beautiful product documentation sites or internal wikis/knowledge bases to get your team and product knowledge in one place.
Good Email Copy - Email copy from great companies.
Unbounce Smart Copy - Smart Copy (previously Snazzy AI) is the easiest way to generate copy for your business.
Good Sales Emails - Best sales emails from great companies