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.
JArchitect - JArchitect is used by developers to measure, understand and improve their Java code quality.
Woboq Code Browser - Web-based code browser for your C/C++ projects
LXR - LXR Cross Referencer, usually known as LXR, is a general-purpose source code indexer and cross-referencer that provides web-based browsing of source code, with links to the definition and usage of any identifier