Really Good Emails - A large collection of good product email design.
Flexmail Solution - Professional email marketing with powerful and easy-to-use features
Good Sales Emails - Best sales emails from great companies
Mizmoz - Easy-to-use, state of the art, email service provider dedicated to support growing businesses.
Great Email Copy - A dose of emails from around the web.
Kingmailer - Kingmailer helps you send, receive and route/forward emails.