Safely and cleanly create closures via string eval

https://metacpan.org/release/Eval-Closure

Real exception classes in Perl

https://metacpan.org/release/Exception-Class

Exporter with features of Sub::Exporter but only core dependencies

https://metacpan.org/release/Exporter-Tiny

Compile and link C code for Perl modules

https://metacpan.org/release/ExtUtils-CBuilder

Easily build XS extensions that depend on XS extensions

http://search.cpan.org/dist/ExtUtils-Depends/

Designed to write a Makefile for an extension module

https://metacpan.org/release/ExtUtils-MakeMaker

Converts Perl XS code into C code

https://metacpan.org/release/ExtUtils-ParseXS

Modules for perl5, for enabling FastCGI support in CGI scripts

https://metacpan.org/release/FCGI

Perl extension for recursively copying files and directories

https://metacpan.org/release/File-Copy-Recursive

Alternative interface to File::Find

https://metacpan.org/release/File-Find-Rule

Get home directory for self or other users

http://search.cpan.org/dist/File-HomeDir/

Parse directory listings

https://metacpan.org/release/File-Listing

File::NFSLock - perl module to do NFS (or not) locking

http://search.cpan.org/dist/File-NFSLock/

Perl5 module to easily removes files and directories

http://search.cpan.org/dist/File-Remove/

Locate per-dist and per-module shared files

https://metacpan.org/release/File-ShareDir

Install read-only data files from a distribution

https://metacpan.org/release/File-ShareDir-Install

Perl Module to read the end of a file as it\x27s appended to

https://metacpan.org/release/File-Tail

Perl5 module to generate temporary files or directories safely

http://search.cpan.org/dist/File-Temp/

Portable implementation of which(1) in Perl

https://metacpan.org/release/File-Which

Perl extension for simple and dumb file system watcher

https://metacpan.org/release/Filesys-Notify-Simple

Number of source filters for perl5 programs

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

Module for converting Perl structures to strings and back

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

Perl extension providing access to the GSSAPIv2 library

https://metacpan.org/release/GSSAPI

Gets country name by IP or hostname

http://search.cpan.org/dist/Geo-IP/

Handle ISO-3166 country codes

https://metacpan.org/release/Geography-Countries

Perl module for processing argument vectors

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

Perl module for extended processing of command line options

Graph, the Perl module for graph operations

https://metacpan.org/release/Graph

GraphViz - Perl interface to the GraphViz graphing tool

https://metacpan.org/release/GraphViz

Module to produce HTML 'breadcrumb trails'

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

Determine the encoding of HTML/XML/XHTML documents

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

High-performance, dynamic web site authoring system

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

Perl module for handling CGI HTML paging of arbitrary data

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

Perl5 module for parsing HTML documents

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

Perl extension for scrubbing/sanitizing html

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

Perl5 module for strip HTML tag

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

Generate HTML tables for CGI scripts

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

Some useful data table in parsing HTML

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

Perl module to use HTML Templates from CGI scripts

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

Web validation in a Perl object using tidy

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

Collection of modules to manipulate HTML syntax trees

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

HTTP Body Parser

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

HTTP Cookie jars

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

WebDAV client library

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

Simple HTTP server class

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

Conversion routines for the HTTP protocol date formats

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

Representation of HTTP style messages

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