Micro-SaaS - All you need to build your own SaaS at one place.
Really Good Emails - A large collection of good product email design.
Nimble SaaS Newsletter - A newsletter of curated highlights and summaries of the best SaaS tricks, articles, podcasts, books, videos, and more.
Good Sales Emails - Best sales emails from great companies
SaaS Boilerplate - Launch a SaaS business faster with this boilerplate app
Great Email Copy - A dose of emails from around the web.