pickSaaS - Hundreds of SaaS products, analyzed.
Really Good Emails - A large collection of good product email design.
Inside SaaS Sales - 1000+ sales emails and voicemails from top SaaS companies
Good Sales Emails - Best sales emails from great companies
SaaS sales for Startup Founders - Free book by Steli Efti from Close.io
Great Email Copy - A dose of emails from around the web.