Doxygen is described as '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' and is a popular documentation generator in the development category. There are more than 25 alternatives to Doxygen for a variety of platforms, including Windows, Linux, Mac, Self-Hosted and Web-based apps. The best Doxygen alternative is MkDocs, which is both free and Open Source. Other great apps like Doxygen are Quartz – Static Site Generator, Sphinx, VitePress and Mintlify.
MkDocs is static site generator that's geared towards building project documentation. Documentation source files are written in Markdown, and configured with a single YAML configuration file.
MkDocs is the most popular Self-Hosted alternative to Doxygen.
MkDocs is the most popular Open Source & free alternative to Doxygen.
Quartz is a set of tools that helps you publish your digital garden and notes as a website for free. Quartz v4 features a from-the-ground rewrite focusing on end-user extensibility and ease-of-use.
Sphinx is a tool that makes it easy to create intelligent and beautiful documentation, written by Georg Brandl and licensed under the BSD license.
Sphinx is the most popular Windows, Mac & Linux alternative to Doxygen.
Simple, powerful, and fast. Meet the modern SSG framework you've always wanted.
Mintlify is the most popular Web-based alternative to Doxygen.
Document! X is a combination of an automated documentation tool and a full authoring environment which can be used to create, publish and maintain accurate, professional quality documentation for .NET, Web Services, Databases, XSDs, Java ,Javascript.
Document! X is the most popular commercial alternative to Doxygen.
Presidium is a software documentation management system for agile teams, and their users, made from commonly used open source components.
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.
DocFX generates Documentation directly from source code (.NET, RESTful API, JavaScript, Java, etc...) and Markdown files.
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...
Simplify your XML Comments! GhostDoc is a Visual Studio extension that automatically generates XML documentation comments for methods and properties based on their type, parameters, name, and other contextual information.
Swagger is for documenting REST APIs - not source code. Doxygen reads docblock comments ... Swagger does not
It seems to be limited to REST APIs.
This alternative is disputed. swagger.io is a legitimate Doxygen alternative, but it might have issues that some users think are important.
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It is used to document REST APIs, where Doxygen is used to document libraries or source code, but not REST APIs