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.
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.
Clang Static Analyzer - The Clang Static Analyzer is a source code analysis tool that finds bugs in C, C++, and Objective-C...
Coverity Scan - Find and fix defects in your Java, C/C++ or C# open source project for free
lgtm.com - lgtm.com is a platform for code analytics.
Klocwork - Klocwork is a static code analysis and SAST tool for C, C++, C#, Java, and JavaScript.