Really Good Emails - A large collection of good product email design.
Free Marketing Email Copy - Marketing email copy from 500+ popular brands.
Good Sales Emails - Best sales emails from great companies
Great Email Copy - A dose of emails from around the web.
Email Inspire - Discover the best of email design and marketing — Browse email newsletters from top brands.
Quokka (formerly Kryptowire) - The gold standard in SAST, MAST, IAST, and more!