A comparison of documentation generators: (https://en.wikipedia.org/wiki/Comparison_of_documentation_generators https://en.wikipedia.org/wiki/Comparison_of_docu

A comparison of documentation generators: (https://en.wikipedia.org/wiki/Comparison_of_documentation_generators https://en.wikipedia.org/wiki/Comparison_of_documentation_ge...). Sphinx and Doxygen seem to be the ones still maintained with the most features. Old man mode Remember back when Linux systems just came with huge packages of documentation? You could do anything offline by reading man pages or looking through /usr/doc/, /usr/share/, etc.