Implementation of the HTTP content negotiation algorithm

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

Merges hashes

https://metacpan.org/release/Hash-Merge

Perl extension to store multiple values per key

http://search.cpan.org/dist/Hash-MultiValue/

Perl extensions for keeping data partially sorted

https://metacpan.org/release/Heap

Lexically scoped subroutine wrappers for Perl

https://metacpan.org/release/Hook-LexWrap

Various IO modules for Perl

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

Perl5 compression modules (bzip2, deflate, gzip, zlib, zip)

https://metacpan.org/release/IO-Compress

Open an HTML file with automatic charset detection

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

IO::Multiplex - Manage IO on many file handles

https://metacpan.org/release/IO-Multiplex

Supporting module for SOAP::Lite

http://search.cpan.org/dist/IO-SessionData/

Perl module with object interface to AF_INET6 domain sockets

https://metacpan.org/release/IO-Socket-INET6

Drop-in replacement for IO::Socket::INET supporting IPv4 and IPv6

https://metacpan.org/release/IO-Socket-IP

Perl5 interface to SSL sockets

https://metacpan.org/release/IO-Socket-SSL

Simplified Perl5 module to handle I/O on in-core strings

https://metacpan.org/release/IO-String

Flexible I/O Perl5 module that allows manipulation of pseudo-TTYs

http://search.cpan.org/dist/IO-Tty/

IO:: style interface to Compress::Zlib

https://metacpan.org/release/IO-Zlib

Use IO handles with non-file objects

https://metacpan.org/release/IO-stringy

Fast lookup of country codes from IP addresses

https://metacpan.org/release/IP-Country

Run subprocesses with piping and redirection

https://metacpan.org/release/IPC-Run

Simple interface to access shared memory

https://metacpan.org/release/IPC-ShareLite

IPC::Signal - Utility functions dealing with signals

https://metacpan.org/release/IPC-Signal

Database connection caching and organization

https://metacpan.org/release/Ima-DBI

Perl module for getting image information

https://metacpan.org/release/Image-Info

Sequentially read Image::Magick object from a filehandle

https://metacpan.org/release/Image-Magick-Iterator

Helper functions for PBM/PGM/PPM image file formats

https://metacpan.org/release/Image-PBMlib

Perl5 module to determine the size of images in several common formats

https://metacpan.org/release/Image-Size

Import packages into other packages

http://search.cpan.org/dist/Import-Into/

Perl extension to convert to JSON (JavaScript Object Notation)

https://metacpan.org/release/JSON

Perl Wrapper Class for the various JSON classes

https://metacpan.org/release/JSON-Any

JSON::XS compatible pure-Perl module

https://metacpan.org/release/JSON-PP

JSON serialising/deserialising, done correctly and fast

https://metacpan.org/release/JSON-XS

Perl extension to convert to JSON (JavaScript Object Notation)

https://metacpan.org/release/JSON

Perl extension interface to convert Japanese text

https://metacpan.org/release/Jcode

Guess media type for a file or a URL

https://metacpan.org/release/LWP-MediaTypes

Provide https support for LWP::UserAgent

https://metacpan.org/release/LWP-Protocol-https

Perl module to prevent leakage of lexical hints

http://search.cpan.org/dist/Lexical-SealRequireHints/

Combines List::Util and List::MoreUtils in one bite-sized package

https://metacpan.org/release/List-AllUtils

Perl extension for comparing lists

https://metacpan.org/release/List-Compare

Provide the stuff missing in List::Util

https://metacpan.org/release/List-MoreUtils

Provide compiled List::MoreUtils functions

https://metacpan.org/release/List-MoreUtils-XS

Message handling functions

https://metacpan.org/release/gettext

Perl extension to bring loggers and listeners together

https://metacpan.org/release/Log-Any

Log4j implementation for Perl

http://log4perl.com

Perl5 module for Base32 encodings

https://metacpan.org/release/MIME-Base32

Perl5 module for Base64 and Quoted-Printable encodings

https://metacpan.org/release/MIME-Base64

Simple interface for creating (not parsing!) MIME messages

https://metacpan.org/release/MIME-Lite

Set of perl5 modules for MIME

https://metacpan.org/release/MIME-tools

Perl extension for determining MIME types

https://metacpan.org/release/MIME-Types

Store multi-level hash structure in single level tied hash

https://metacpan.org/release/MLDBM

MLDBM::Sync - safe concurrent access to MLDBM databases

http://search.cpan.org/dist/MLDBM-Sync/