CppDoc!

Doxygen is a tool for generating documentation from annotated C++ sources, as well as other popular programming languages like C, Objective-C, C#, PHP, Java, Python, IDL (CORBA, Microsoft, and UNO/OpenOffice flavors), Fortran, VHDL, Tcl, and to some extent D.

Slate - beautiful static documentation for your API.

DoxyS is a code documentation tool for C++/C. DoxyS strives to yield a very professional looking output, presenting the the code in a structured easy to navigate set of HTML pages. Easy to use: Just navigate to the root of your code directory and type doxys.

PHP documentation generator based on docblock parsing.

Sandcastle produces accurate, MSDN style, comprehensive documentation by reflecting over the source assemblies and optionally integrating XML Documentation Comments. Sandcastle has the following key features:

NDoc generates class library documentation from .NET assemblies and the XML documentation files generated by the C# compiler (or with an add-on tool for VB.NET).

Natural Docs is an open-source documentation generator for multiple programming languages. 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.

Javadoc is a tool from Sun Microsystems for generating API documentation in HTML format from doc comments in source code.

Asciidoclet is a Javadoc Doclet based on Asciidoctor that lets you write Javadoc in the AsciiDoc syntax.

LDoc is Lua documentation generator intended to be compatible with LuaDoc and thus follows the pattern set by the various Doc tools:

LuaDoc is a documentation generator tool for Lua source code. It parses the declarations and documentation comments in a set of Lua source files and produces a set of XHTML pages describing the commented declarations and functions.

Doc-O-Matic is a software source code documentation and Help authoring tool. It takes source code and comments, adds conceptual topics and external input and produces documentation from it. With its single-source approach it generates many different kinds of output from a single documentation base.

EDoC++ is a C++ source analysis tool designed to identify problems associated with the use of exceptions in C++ code. Additionally EDoC++ can be used to generate detailed documentation