Shipit is an automation engine and a deployment tool.
Shipit provides a good alternative to Capistrano or other build tools. It is easy to deploy or to automate simple tasks on your remote servers.
Intercom on Starting Up - A book about growing a startup
Really Good Emails - A large collection of good product email design.
Intercom on Product Management - The ultimate resource for aspiring product managers
Good Sales Emails - Best sales emails from great companies
Founder Affirmations - Empowering self-talk for entrepreneurs
Great Email Copy - A dose of emails from around the web.