Apache module that provides DNS-SD capabilities

http://0pointer.de/lennart/projects/mod_dnssd/

Apache 2.4 fast-cgi module

https://github.com/FastCGI-Archives/mod_fastcgi

Embeds a Perl interpreter in the Apache server

https://perl.apache.org/

PHP Scripting Language

http://www.php.net/

PHP Scripting Language

http://www.php.net/

PHP Scripting Language

http://www.php.net/

Apache module that embeds the Python interpreter within the server

http://www.modpython.org/

Intrusion detection and prevention engine

https://www.modsecurity.org/

Python WSGI adapter module for Apache

http://www.modwsgi.org/

Python WSGI adapter module for Apache

https://www.modwsgi.org/

Python clone of WikiWiki

https://moinmo.in/

Unix system management and proactive monitoring

http://mmonit.com/monit/

Open source implementation of .NET Development Framework

http://www.mono-project.com/

Mono framework to create extensible applications

http://www.mono-project.com/Mono.Addins

VisualBasic.NET support for Mono

http://www.mono-project.com/VisualBasic.NET

Drive a buggy across the moons surface

http://www.seehuhn.de/comp/moon-buggy

Powerful text mode based programming IDE

http://konst.org.ua/motor/

Simple text editor for the Xfce Desktop

https://git.xfce.org/apps/mousepad/about/

Mouse accessibility enhancements for the GNOME desktop

https://launchpad.net/mousetweaks/

PostScript printing util for ASCII files, email, USENET news articles, etc

Library and tools to read, create, and modify mp4 files

http://code.google.com/p/mp4v2/

External MIME packer/unpacker

Library of complex numbers with arbitrarily high precision

https://www.multiprecision.org/mpc/

MPD client for GNUstep

http://www.musicpd.org/MPDCon.shtml

MPEG-2 Encoder and Decoder

http://www.mpeg.org/MPEG/video/mssg-free-mpeg-software.html

Library for multiple-precision floating-point computations

https://www.mpfr.org/

Command-line player for MPEG Layer 1, 2, and 3 audio files

http://www.mpg123.de/

High performance media player supporting many formats

http://www.mplayerhq.hu/

Skins for MPlayer's Graphical User Interface (GUI)

http://www.mplayerhq.hu/

Graphical Package Manager for MidnightBSD

http://github.com/laffer1/mport-manager

SMTP plugin for MUAs

https://marlam.de/msmtp/

A collection of tools for manipulating MSDOS files

http://www.gnu.org/software/mtools/intro.html

Common components between a munin node and server

https://munin-monitoring.org/

Collector part of Munin

https://munin-monitoring.org/

Node-specific part of Munin

https://munin-monitoring.org/

Remote-controllable music daemon

https://www.musicpd.org/

Small but powerful text based program for read/writing e-mail

http://www.mutt.org/

Window and compositing manager based on Clutter

https://gitlab.gnome.org/GNOME/mutter

MySQL Connector/J: JDBC interface for MySQL

https://dev.mysql.com/downloads/connector/j/

Convert a MySQL dump to a PostgreSQL dump

http://pgfoundry.org/projects/mysql2pgsql/

Multithreaded SQL database (client)

http://www.mysql.com/

Multithreaded SQL database (server)

http://www.mysql.com/

Multithreaded SQL database (client)

http://www.mysql.com/

Multithreaded SQL database (server)

http://www.mysql.com/

Simple thesaurus library

http://hunspell.github.io/

Nano's ANOther editor, an enhanced free Pico clone

http://www.nano-editor.org/

Small weblog engine written in Bash for the command line

http://nanoblogger.sourceforge.net/

Socket library that provides several common communication patterns

https://nanomsg.org/

Network Audio System

http://radscan.com/nas.html

General-purpose multi-platform x86 and amd64 assembler

https://www.nasm.us/