Transparent BigNumber/BigRational support for Perl

https://metacpan.org/release/bignum

A perl5 interface to build chart graphics

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

Perl common defaults with lower memory usage

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

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 bindings for Version control system

http://subversion.apache.org/

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/

PAM modules for KDE Display Manager

Pam module for authenticating with LDAP

http://www.padl.com/OSS/pam_ldap.html

A full-screen shell (commander GUI) for *nix.

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/

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/

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/

PowerPC emulator

http://pearpc.sourceforge.net/

Indents and reformats Perl scripts to make them easier to read

http://perltidy.sourceforge.net/

German phone code / Deutsche Telefonvorwahl (AVON)

PHP documentation in HTML

http://www.php.net/download-docs.php

Library to provide abstract access to various archives

http://icculus.org/physfs/

Mail and news client descended from Pine

http://www.washington.edu/alpine/

Suite of tools used to connect and sync your Palm handled

http://www.pilot-link.org/

Converts text into the Doc format used by PalmPilots

http://www.concentric.net/~rbram/

Simple /bin/sh-based filters to use GnuPG with Alpine

Low-level pixel manipulation library

http://pixman.org

Utility to help to configure compiler and linker flags

https://git.sr.ht/~kaniini/pkgconf

Pre Make Kit, a sane replacement for autoconf

http://pmk.sourceforge.net/

Library for manipulating PNG images

http://www.libpng.org/pub/png/libpng.html

Framework for controlling access to system-wide components

http://www.freedesktop.org/wiki/Software/PolicyKit

Small and fast caching web proxy

http://www.pps.jussieu.fr/~jch/software/polipo/

Very fast, highly configurable POP3 server (fully RFC1939 compliant)

PDF rendering library

https://poppler.freedesktop.org/

Poppler encoding data

https://poppler.freedesktop.org/

Getopt(3) like library with a number of enhancements, from Redhat

http://freshmeat.net/projects/popt/

Console-based AIM client

http://dev.ojnk.net/

Portable cross-platform Audio API

http://www.portaudio.com/