Andika TrueType fonts

https://software.sil.org/andika/

Retrofuturism inspired monospaced programming font

https://github.com/benbusby/anomaly-mono

Fixed width sans designed especially for coders

http://www.ms-studio.com/FontSales/anonymouspro.html

Another HTML-lint (all messages are written in Japanese)

http://openlab.ring.gr.jp/k16/htmllint/

Radically simple IT automation

https://www.ansible.com/

Another Kana-Kanji conversion system

https://salsa.debian.org/debian/anthy

Library for Japanese text input

https://github.com/fujiwarat/anthy-unicode/

Sendmail milter wich uses McAfee Virus Scan or clamav

Application for displaying Microsoft(R) Word documents

http://www.winfield.demon.nl/index.html

ANother Tool for Language Recognition

https://www.antlr2.org/

ANother Tool for Language Recognition

https://www.antlr3.org/

ANother Tool for Language Recognition

https://www.antlr.org/

Aozora Bunko Text Viewer

https://azelpg.gitlab.io/azsky2/soft/aobook.html

AV1 reference encoder/decoder

https://aomedia.org/

Ncurses based arcade game with only 64 lines of code

http://aop.raffi.at/

Java- and XML-based build tool, conceptually similar to make

https://ant.apache.org/

Apache Commons Byte Code Engineering Library

http://commons.apache.org/proper/commons-bcel/

Java library for command line arguments and options

https://commons.apache.org/proper/commons-cli/

Implementations of common encoders and decoders

https://commons.apache.org/codec/

Classes that extend/augment the Java Collections Framework

https://commons.apache.org/proper/commons-collections/

Wrapper code to start/stop a Java application as a daemon

http://commons.apache.org/daemon/

Apache Commons Database Connection Pool

https://commons.apache.org/dbcp/

Package implementing the client side of the HTTP standard

https://hc.apache.org/httpclient-3.x/

Apache library with helper utilities for the java.lang API

https://commons.apache.org/proper/commons-lang/

Apache library with helper utilities for the java.lang API

https://commons.apache.org/proper/commons-lang/

Generic logging wrapper library

https://commons.apache.org/proper/commons-logging/

Apache Commons Object-pooling API

https://commons.apache.org/pool/

Fast and flexible logging library for Java

https://logging.apache.org/log4j/2.x/

High performance search server built using Lucene Java

https://lucene.apache.org/solr/

Version 2.4.x of Apache web server

https://httpd.apache.org/

Apache RealTime log stats

http://www.webta.org/projects/apachetop/

Automated password generator

APL385 Unicode monospaced code font

http://apl385.com/fonts

Generic helper tool to build app in a distributable format

https://github.com/develar/app-builder

Appmenu DBusMenu registrar

https://gitlab.com/vala-panel-project/vala-panel-appmenu/-/tree/master/subprojects/registrar

Program to list application's resources

Machine-readable software metadata for desktop environments

https://www.freedesktop.org/wiki/Distributions/AppStream/

Library to help with AppStream metadata

https://github.com/hughsie/appstream-glib/

Qt bindings to AppStream

https://www.freedesktop.org/wiki/Distributions/AppStream/

GNUstep application wrapper

http://appwrapper.sourceforge.net/

Apache Portability Library

https://apr.apache.org/

Aquantia AQtion (Atlantic) Network Driver (Development Preview)

https://github.com/Aquantia/aqtion-freebsd

Create & extract files from DOS .ARC files

https://github.com/ani6al/arc

Mount archives with FUSE

https://www.cybernoia.de/software/archivemount.html

Standalone version of arguments parsing functions from GLIBC

https://github.com/argp-standalone/argp-standalone/

ICC compatible color management system

http://www.argyllcms.com/

Yet another download tool

https://aria2.github.io/

ARIB STD-B24 library

https://github.com/nkoriyama/aribb24

Open source implementation of the ARJ archiver

http://arj.sourceforge.net/

GNU Compiler Collection for bare metal arm cross-development

https://gcc.gnu.org/