Simple Perl module for writing XML documents

https://metacpan.org/release/XML-Writer

Modules for parsing and evaluating XPath statements

https://metacpan.org/release/XML-XPath

YAML implementation in Perl

https://metacpan.org/release/YAML

Transparent BigNumber/BigRational support for Perl

https://metacpan.org/release/bignum

Perl common defaults with lower memory usage

https://metacpan.org/release/common-sense

Perl Modules of ePerl package: Parse::ePerl, Apache::ePerl

http://www.ossp.org/pkg/tool/eperl/

Perl5 library for WWW access

https://metacpan.org/release/libwww-perl

Collection of Perl5 modules for working with XML

https://metacpan.org/release/libxml-perl

Keep imports and functions out of your namespace

https://metacpan.org/release/namespace-clean

Establish an ISA relationship with base classes at compile time

https://metacpan.org/release/parent

Client interface to LDAP (includes Net::LDAP)

https://metacpan.org/release/perl-ldap

Perl interpreter-based threads

https://metacpan.org/release/threads

Perl extension for sharing data structures between threads

http://search.cpan.org/dist/threads-shared/

Script that helps install Postscript fonts in X Window System

Perl extension for Version Objects

https://metacpan.org/release/version

File archiver with high compression ratio

http://p7zip.sourceforge.net/

Authenticate applications requiring PAM services

http://www.marcuscom.com/pam_helper/

Open-source framework for the layout and rendering of i18n text

https://www.pango.org/

Deprecated pangoX support

http://www.pango.org/

GNU patch utility

https://savannah.gnu.org/projects/patch/

Small collection of programs that operate on patch files

http://cyberelk.net/tim/software/patchutils/

Measurement tool for capacity estimation of network paths

http://www.pathrate.org

Parallel BZIP2

http://compression.ca/pbzip2/

The Portable C Compiler

http://pcc.ludd.ltu.se/

Purdue Compiler Construction Tool Set

http://www.polhode.com/pccts.html

Database of all known IDs used in PCI devices

https://pci-ids.ucw.cz/ https://github.com/pciutils/pciids

Sun PC NFS authentication and printing server

Perl Compatible Regular Expressions library

https://www.pcre.org/

Middleware library to access a smart card using SCard API (PC/SC)

https://pcsclite.apdu.fr/

C library for dynamically generating PDF

http://www.pdflib.de/

The Public Domain Korn Shell

http://www.cs.mun.ca/~michael/pdksh/

Caching (permanently, writes to disk on exit) DNS proxy-server

http://members.home.nl/p.a.rombouts/pdnsd/

PEAR framework for PHP

https://pear.php.net/

PowerPC emulator

http://pearpc.sourceforge.net/

Alternative PHP Cache

http://pecl.php.net/package/APC

PECL extension for the unicode Bidi algorithm

http://pecl.php.net/package/fribidi/

PECL extension to support Internationalization(ICU)

http://pecl.php.net/package/intl

Memcached extension

http://pecl.php.net/package/memcache/

Practical Extraction and Report Language

http://www.perl.org/

Indents and reformats Perl scripts to make them easier to read

http://perltidy.sourceforge.net/

Minimalistic, headless, WebKit-based, JavaScript-driven tool

http://www.phantomjs.org/

German phone code / Deutsche Telefonvorwahl (AVON)

Phoronix Benchmarking Suite

https://www.phoronix-test-suite.com

Xdebug extension for PHP

http://www.xdebug.org/

PHP Scripting Language

http://www.php.net/

The bcmath shared extension for php

http://www.php.net/

The bz2 shared extension for php

http://www.php.net/

The calendar shared extension for php

http://www.php.net/

The ctype shared extension for php

http://www.php.net/

The curl shared extension for php

http://www.php.net/