Doxygen - Cross-platform documentation system

Doxygen is a cross-platform, JavaDoc-like documentation system for C++, Java, C, and IDL. Doxygen can be used to generate an on-line class browser (in HTML) and/or an off-line reference manual (in LaTeX or RTF) from a set of source files. Doxygen can also be configured to extract the code-structure from undocumented source files. This can be very useful to quickly find your way in large source distributions.