Really Good Emails - A large collection of good product email design.
ContentFly - Simple and reliable content ordering platform for busy marketers. Only pre-vetted writers from USA & Canada and 14-day money-back guarantee.
Good Sales Emails - Best sales emails from great companies
Copydue - Top writers, on-demand for as low as $150/mo
Great Email Copy - A dose of emails from around the web.
Wordzen - We write your emails for you. Literally.