Embedded Source Documentation Tool
Using this tool you can embed source documentation into your source and generate structured HTML. The syntax of the embedded source documentation is flexible, therefore you can use this tool on Perl, C, FORTRAN or practically any programming language, while your sources are still fully compliant with the syntax of the programming language and have readable comments even in the program text.
You can also use the tool as a preprocessor. As some languages, like Perl are interpretive, extensive comments reduce performance. esd2html provides way to maintain 'source' scripts and generate 'runnable' version that strips the comment.
What you see is the main section of the project, which in this case contains only one file: