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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.

CodeRush - DevExpress CodeRush for Roslyn uses significantly less memory, works faster, and lets you start Visual Studio faster.

PyCharm - Python & Django IDE with intelligent code completion, on-the-fly error checking, quick-fixes, and much more...

Visual Assist X - Visual Assist X dramatically reduces application development time with key new features and...

Coverity Scan - Find and fix defects in your Java, C/C++ or C# open source project for free