Module for converting Perl structures to strings and back

Subroutine definitions with parameter lists

https://metacpan.org/release/Function-Parameters

Write filesystems in Perl using FUSE

https://metacpan.org/release/Fuse

Perl5 interface to Gd Graphics Library version2

http://stein.cshl.org/WWW/software/GD/

Graph plotting module for perl5

https://metacpan.org/release/GDGraph

Text utilities for use with GD drawing package

GDS2 stream module

https://metacpan.org/release/GDS2

Perl extension providing access to the GSSAPIv2 library

http://search.cpan.org/dist/GSSAPI/

Perl API for MaxMind GeoIP2 web services and databases

https://metacpan.org/release/GeoIP2

Handle ISO-3166 country codes

http://search.cpan.org/dist/Geography-Countries/

Perl module for processing argument vectors

https://metacpan.org/release/Getopt-ArgvFile

Perl module for extended processing of command line options

Getopt::Long with usage text

https://metacpan.org/release/Getopt-Long-Descriptive

Interface to Glib and GObject libraries

https://gtk2-perl.sourceforge.net/

Dynamically create Perl language bindings

https://metacpan.org/release/Glib-Object-Introspection

Graph, the Perl module for graph operations

http://search.cpan.org/dist/Graph/

GraphViz - Perl interface to the GraphViz graphing tool

http://search.cpan.org/dist/GraphViz/

Perl module for Gtk+ 3.x graphical user interface library

https://metacpan.org/pod/Gtk3

Simple and fast gzip and gunzip

https://metacpan.org/release/Gzip-Faster

Module to produce HTML 'breadcrumb trails'

http://search.cpan.org/dist/HTML-Breadcrumbs/

Extended interface to HTML::Tree's HTML::Element class

https://metacpan.org/release/HTML-Element-Extended

Determine the encoding of HTML/XML/XHTML documents

http://search.cpan.org/dist/HTML-Encoding/

Convert numbered HTML entities with Perl

https://metacpan.org/release/HTML-Entities-Numbered

Class that represents an HTML form element

https://metacpan.org/release/HTML-Form

Module to format HTML to text or PS

https://metacpan.org/release/NIGELM/HTML-Format-2.12

HTML::Lint - check for HTML errors in a string or file

https://metacpan.org/release/HTML-Lint

High-performance, dynamic web site authoring system

http://search.cpan.org/dist/HTML-Mason/

Generate mobile-jp html tags

https://metacpan.org/release/HTML-MobileJp

Perl module for handling CGI HTML paging of arbitrary data

http://search.cpan.org/dist/HTML-Pager/

Perl5 module for parsing HTML documents

http://search.cpan.org/dist/HTML-Parser/

Perl extension for scrubbing/sanitizing html

http://search.cpan.org/dist/HTML-Scrubber/

CSS selector to XPath compiler Perl module

https://metacpan.org/release/HTML-Selector-XPath

This is a simple HTML link extractor

https://metacpan.org/release/HTML-SimpleLinkExtor

Perl5 module for strip HTML tag

http://search.cpan.org/dist/HTML-Strip/

Strip scripting constructs out of HTML

https://metacpan.org/release/HTML-StripScripts

XSS filter using HTML::Parser

https://metacpan.org/release/HTML-StripScripts-Parser

Generate HTML tables for CGI scripts

http://www.chime.ucl.ac.uk/~rmhiajp/htmltable/index.htm

Extract text contained in tables within an HTML document

https://metacpan.org/release/HTML-TableExtract

Some useful data table in parsing HTML

http://search.cpan.org/dist/HTML-Tagset/

Perl module to use HTML Templates from CGI scripts

http://sourceforge.net/projects/html-template/

Easy way to use the associate option from HTML::Template

https://metacpan.org/release/HTML-Template-HashWrapper

Web validation in a Perl object using tidy

http://search.cpan.org/dist/HTML-Tidy/

Collection of modules to manupulate HTML syntax trees

http://search.cpan.org/dist/HTML-Tree/

Add XPath support to HTML::TreeBuilder

https://metacpan.org/release/HTML-TreeBuilder-XPath

HTTP Body Parser

http://search.cpan.org/dist/HTTP-Body/

Minimalist HTTP user agent cookie jar

https://metacpan.org/release/HTTP-CookieJar

HTTP Cookie jars

http://search.cpan.org/dist/HTTP-Cookies/

WebDAV client library

http://search.cpan.org/dist/HTTP-DAV/

Simple HTTP server class

http://search.cpan.org/dist/HTTP-Daemon/

Conversion routines for the HTTP protocol date formats

http://search.cpan.org/dist/HTTP-Date/