PHP documentation in HTML

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

PHP application to administer LDAP over the web

http://phpldapadmin.sourceforge.net/

Full-featured open-source newsletter manager

http://www.phplist.org/

Full Featured Email Transfer Class for PHP

https://github.com/PHPMailer/PHPMailer

Full Featured Email Transfer Class for PHP

https://github.com/PHPMailer/PHPMailer

Set of PHP-scripts to manage MySQL over the web

https://www.phpmyadmin.net/

Set of PHP-scripts to manage MySQL over the web

https://www.phpmyadmin.net/

Web Based Postgres Administration

http://phppgadmin.sourceforge.net/

Library to provide abstract access to various archives

http://icculus.org/physfs/

Mail and news client descended from Pine

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

Pidgin multi-protocol messaging client (GTK+ UI)

https://www.pidgin.im/

Pidgin plugin to help twitting via pidgin

http://honeyplanet.jp/pidgin-twitter/

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

Collection of simple PIN or passphrase entry dialogs

http://www.gnupg.org/aegypten2

GNOME 3 version of the GnuPG password dialog

http://www.gnupg.org/aegypten2

Console version of the GnuPG password dialog

http://www.gnupg.org/aegypten2

Visualize binary data in terminal

https://github.com/FireyFly/pixd/

Graphics editing software for small-scale pictures for GNUstep

http://home.gna.org/gsimageapps/

Low-level pixel manipulation library

http://pixman.org

Utility to help to configure compiler and linker flags

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

IBM's signature typeface

https://github.com/IBM/plex

Notify, Log Now Playing and Watched content from a Plex Media Server

https://github.com/ljunkie/plexWatch

Free clone of KlipFolio for GNUstep

http://www.collaboration-world.com/cgi-bin/project/index.cgi?pid=7

A plotting library and toolkit

http://www.gnu.org/software/plotutils/plotutils.html

WikiWikiWeb clone using PHP

https://www.pmwiki.org

Library for manipulating PNG images

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

C++ libraries with a network/internet focus

http://pocoproject.org/

Vorbis comment editor for GNUstep

https://www.eskimo.com/~pburns/Poe/

Framework for controlling access to system-wide components

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

GNOME frontend to the PolicyKit framework

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

Small and fast caching web proxy

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

Framework for controlling access to system-wide components

https://www.freedesktop.org/wiki/Software/polkit/

GNOME frontend to the PolicyKit framework

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

Qt5 wrapper around Polkit libraries

http://projects.kde.org/projects/kdesupport/polkit-qt-1

PDF rendering library

https://poppler.freedesktop.org/

Poppler encoding data

https://poppler.freedesktop.org/

GLib bindings to poppler

https://poppler.freedesktop.org/

Qt 5 bindings to poppler

https://poppler.freedesktop.org/

Poppler's xpdf-workalike command line utilities

https://poppler.freedesktop.org/

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

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

Interactive learning aid for pairs of words

http://popup.sourceforge.net/

Portable cross-platform Audio API

http://www.portaudio.com/

Format Ports Makefiles

https://github.com/t6/portfmt

Verifier for mports directory

Port searching tool that supports search by packing list files

http://people.freebsd.org/~vd/portsearch

Secure alternative to widely-used Sendmail

http://www.postfix.org/

Java JDBC implementation for PostgreSQL

https://jdbc.postgresql.org/

New C++ interface for PostgreSQL

http://pqxx.org/

PostgreSQL database (client)

https://www.postgresql.org/

The contrib utilities from the PostgreSQL distribution

https://www.postgresql.org/