HTML PLAIN is a "HTML Preprocessor Lacking An Interesting Name". Symbolic names instead of filenames allows files to be moved around without breaking links. Templates allow easy customization and changes of the layout. Tags can be redefined for a better structure of the document. Beginners can use one of the given templates and do not have to use any markup language at all. Experts can write their own Perl macros in order to get access to metadata and more flexibility.
HTML-Tree is a Perl program that recursively decends directories, and creates a web-page based graphical map of HTML pages on a webserver. A configuration file provides control over the "root" directory for the map, map page title and header, directories to be excluded, link substitution strings, and map page background image. This mapper may be run as a cron task to provide an up-to-date roadmap of a webserver. It is primarily useful as a web site development and administration tool, since it shows all pages available to web browsers, and can identify where links are needed.
HTML::EP is a server-side embedded HTML system in the style of PHP3, that allows you to combine the full power of Perl with your HTML pages. HTML::EP runs as a separate CGI binary or (for full speed) as a mod_perl package. It includes database access via DBI, the Perl Database Interface, session support and allows quite easy extension via a modular, OO interface.
HTMLArchive provides Webmasters with an easy means to handle archiving Web pages. After some preparatory setup, the webmaster need only create the new Web page and run HTMLArchive. HTMLArchive will hook the new page into the indexing page, and optionally put text from the latest page into your indexing page.