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.
Coverity Scan - Find and fix defects in your Java, C/C++ or C# open source project for free
Cppcheck - Cppcheck is an analysis tool for C/C++ code. It detects the types of bugs that the compilers normally fail to detect. The goal is no false positives. CppCheckDownload cppcheck for free.
Embold.io - Peer Code Review
Clang Static Analyzer - The Clang Static Analyzer is a source code analysis tool that finds bugs in C, C++, and Objective-C...
ReSharper - ReSharper is a productivity tool for visual studio that provides tools and features to help you manage your code.