Natural Docs is an open-source, extensible, multi-language documentation
generator.  You document your code in a natural syntax that reads like plain
English.  Natural Docs then scans your code and builds high-quality HTML
documentation from it.

Full Language Support (Full code documentation, Inheritance diagrams,
Auto-scoping):
    C#, Perl, ActionScript 2

Basic Language Support (Explicit documentation only, No inheritance diagrams,
Topic scoping):
    C/C++, Java, PHP, Python, PL/SQL, Visual Basic, Pascal/Delphi, Ada,
    JavaScript, Ruby, Tcl, ColdFusion, Assembly, Fortran (free-format only),
    R, Makefiles, Plain Text, Custom Languages