Zurb - ZURB helps companies design better websites, services and products through services that include design strategy and interaction design.
Really Good Emails - A large collection of good product email design.
Designjar - Designjar offers graphics for social media and online advertising.
Good Sales Emails - Best sales emails from great companies
StoryVisionVideo - StoryVisionVideo provides whiteboard and motion graphics explainer video services.
Great Email Copy - A dose of emails from around the web.