Apache Portability Library

https://apr.apache.org/

Create & extract files from DOS .ARC files

https://github.com/ani6al/arc

Asynchronous DNS resolver library

ftp://athena-dist.mit.edu/pub/ATHENA/ares/

ICC compatible color management system

https://www.argyllcms.com/

Open source implementation of the ARJ archiver

https://arj.sourceforge.net/

Text document format for writing short documents and man pages

https://github.com/asciidoc-py/asciidoc-py

Afterstep clock with some language extensions

Cross-platform C++ library for network and low-level I/O programming

https://think-async.com/Asio/

Spelling checker with better suggestion logic than ispell

http://aspell.net/

Ispell compatibility script for aspell

http://aspell.net/

Assistive Technology Service Provider Interface

http://developer.gnome.org/projects/gap/

Programming reference for accessibility/at-spi

http://developer.gnome.org/projects/gap/

Assisted Technology Provider module for GTK+

https://gitlab.gnome.org/GNOME/at-spi2-atk

Assistive Technology Service Provider Interface

https://gitlab.gnome.org/GNOME/at-spi2-core

GNOME accessibility toolkit (ATK)

https://developer.gnome.org/atk/

Programming reference for accessibility/atk

http://developer.gnome.org/projects/gap/

C++ wrapper for ATK API library

https://www.gtkmm.org/

Software for collecting and analyzing calls from different PBX models

http://www.atslog.com/en/about/

Open Collaboration Services API library

http://www.kde.org/

Generate configure scripts and related files

https://www.gnu.org/software/autoconf/

Wrapper script for GNU autoconf

Automatically configure source code on many Un*x platforms (2.13)

http://sources.redhat.com/autoconf/

Tool designed to simplify the creation and maintenance of programs

https://www.gnu.org/software/autogen/

GNU Standards-compliant Makefile generator

https://www.gnu.org/software/automake/

Wrapper script for GNU automake

GNU Standards-compliant Makefile generator (legacy 1.4)

http://sources.redhat.com/automake/

Automatic moc for Qt 4 packages

http://www.kde.org

Automatically restart SSH sessions and tunnels

https://www.harding.motd.ca/autossh/

Autotools meta-port

Tool to automatically update DNSSEC trust anchors

http://www.nlnetlabs.nl/projects/autotrust/

Service discovery on a local network

https://www.avahi.org/

IPv4LL network address configuration daemon

https://www.avahi.org/

Gtk+ tools and bindings to the Avahi mDNS system

https://www.avahi.org/

Gtk+ 3 library to the Avahi mDNS system

https://www.avahi.org/

Install an avahi-gtk* header to avoid conflict

https://www.avahi.org/

mDNSResponder compatibility from Avahi

https://www.avahi.org/

Qt 4 bindings to the Avahi mDNS system

http://www.avahi.org/

Highly configurable, next generation framework window manager

https://awesomewm.org/

Free real-time logfile analyzer to get advanced web statistics

https://www.awstats.org/

Dynamic pixel format conversion library

https://www.gegl.org/babl/

Network backup solution (client)

http://www.bacula.org/

Network backup solution (static client)

http://www.bacula.org/

Bacula document set

http://www.bacula.org/

Network backup solution (server)

http://www.bacula.org/

GNOME graphical directory tree analyzer

https://wiki.gnome.org/Apps/Baobab

Interpreter for Snort unified2 binary output files

https://github.com/firnsy/barnyard2

GNU Project's Bourne Again SHell

https://www.gnu.org/software/bash/

Programmable completion library for Bash

https://github.com/scop/bash-completion

Free, portable, Open Source 68k Mac emulator

http://gwenole.beauchesne.info/projects/basilisk2/

Monsters, explosions, destruction game for X Window System

https://www.evl.uic.edu/aej/AndyBattalion.html