HCL AppScan - HCL Software Site
Coverity Scan - Find and fix defects in your Java, C/C++ or C# open source project for free
Clearbit Salesforce Prospector - Quickly build targeted lead lists directly in Salesforce
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.
Immediately - Mobile sales email and CRM management for Gmail & Salesforce
CodeClimate - Code Climate provides automated code review for your apps, letting you fix quality and security issues before they hit production. We check every commit, branch and pull request for changes in quality and potential vulnerabilities.