Coverity Scan - Find and fix defects in your Java, C/C++ or C# open source project for free
Really Good Emails - A large collection of good product email design.
HCL AppScan - HCL Software Site
Good Sales Emails - Best sales emails from great companies
SonarQube - SonarQube, a core component of the Sonar solution, is an open source, self-managed tool that systematically helps developers and organizations deliver Clean Code.
Great Email Copy - A dose of emails from around the web.