What are some alternatives?
When comparing How to Nail Cold Email and Good Email Copy, you can also consider the following products
Great Email Copy - A dose of emails from around the web.
Really Good Emails - A large collection of good product email design.
Good Sales Emails - Best sales emails from great companies
Templates by EmailOctopus - Free (do whatever you want) responsive email templates
Smart Compose in Gmail - Write emails faster with Smart Compose in Gmail
Cold Email Generator - Quickly create a 5-touchpoint email campaign