Understand - Combines a powerful Code Editor together with an impressive array of static analysis tools that will change the way you work with code.
Source Insight - Source Insight is a programming editor & code browser with built-in live analysis for C/C++, C#, Java, and more; helping you understand large projects.
Sourcetrail - Sourcetrail is a cross-platform source explorer for C/C++ and Java.
Woboq Code Browser - Web-based code browser for your C/C++ projects
JArchitect - JArchitect is used by developers to measure, understand and improve their Java code quality.
Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.