Doxygen is a very cool documentation generator (HTML, LaTeX, RTF, PDF, etc) for C, C++ and IDL.
Free, portable, actively developed with a set of good mailing lists for support and developers.
http://www.doxygen.org/
See also:
GraphViz,
DocPlusPlus,
JavaDoc,
CppDoc
"Doxygen is a documentation system for C++, C, Java, IDL (Corba and Microsoft flavors) and to some extent PHP and C#. Doxygen can generate an on-line documentation browser (in HTML) and/or an off-line reference manual ... The documentation is extracted directly from the sources, which makes it much easier to keep the documentation consistent with the source code."
http://www.stack.nl/~dimitri/doxygen/
Doxygen is a
BarelyLiterateProgramming system.
For
ObjectiveCee, we have
AutoDoc and
HeaderDoc. The latter ships with
ExCode on Panther (
MacOsx 10.3).
AutoDoc has been around since
NextStep/
OpenStep.
CategoryDocumentation CategoryCpp