Node-specific part of Munin

https://munin-monitoring.org/

Lightweight PDF viewer and toolkit

https://www.mupdf.com/

Decoder, encoder, and replaygain for musepack (mpc)

https://www.musepack.net/

Free music composition & notation software

https://musescore.org/ https://github.com/musescore/MuseScore

Remote-controllable music daemon

https://www.musicpd.org/

Mustache text templates for modern C++

https://github.com/kainjow/Mustache

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

PHP-based bulletin board / discussion forum system

https://mybboard.net/

Fast painting/scribbling program

http://mypaint.org/

Brushes used by MyPaint and other software using libmypaint

https://github.com/mypaint/mypaint-brushes

Brushes used by MyPaint and other software using libmypaint

https://github.com/mypaint/mypaint-brushes

MySQL database connector for C++

https://dev.mysql.com/doc/relnotes/connector-cpp/en/index.html

MySQL Connector/J: JDBC interface for MySQL

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

MySQL Connector/J: JDBC interface for MySQL

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

Multithreaded SQL database (client)

https://www.mysql.com/

Multithreaded SQL database (server)

http://www.mysql.com/

Assist you with MySQL Configuration

https://github.com/major/MySQLTuner-perl

Simple thesaurus library

http://hunspell.github.io/

Powerful network monitoring system

https://www.nagios.org/

Plugins for Nagios

https://www.nagios-plugins.org/

Powerful network monitoring system

https://www.nagios.org/

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/

Nauty & Traces are programs for computing graph automorphism

https://pallini.di.uniroma1.it/

2ch.net and 2ch-like BBS navigator for Emacsen

https://navi2ch.sourceforge.net

Brian Kernighan's pattern scanning and processing language

http://cm.bell-labs.com/cm/cs/awkbook/index.html

17 text-based modern games

https://github.com/abakh/nbsdgames

Ncurses du(1)

https://dev.yorhel.nl/ncdu

FTP client with advanced user interface

https://www.ncftp.com/ncftp/

Fast and modern Gopher, Gemini and finger terminal client

https://github.com/jansc/ncgopher

Library for terminal-independent, full-screen output

https://invisible-island.net/ncurses/

VZ-like full-screen text editor with Japanese support

https://hp.vector.co.jp/authors/VA018758/ne/

Athena Widgets with N*XTSTEP appearance

http://siag.nu/neXtaw/

Scalable overlay networking tool

https://github.com/slackhq/nebula

File manager for the Cinnamon desktop

http://cinnamon.linuxmint.com/

Fast, highly customizable system info script

https://github.com/dylanaraps/neofetch

HTTP and WebDAV client library for Unix systems

https://notroj.github.io/neon/

Next-generation Vim

https://neovim.io/

Neovim client library and QT6 GUI

https://github.com/equalsraf/neovim-qt/

Developer-targeted fonts with a high number of glyphs

https://nerdfonts.com/

File server for Mac OS X

http://netatalk.sourceforge.net/

Modular, standards-based integrated development environment

https://netbeans.apache.org/

Simple utility which reads and writes data across network connections

http://nc110.sourceforge.net/

C library for machine-independent, array-oriented data access

https://www.unidata.ucar.edu/software/netcdf/ https://github.com/Unidata/netcdf-c

Objective-C framework for socket programming with GNUstep

http://gap.nongnu.org/talksoup/

Tool for comparing netlists (a process known as LVS)

http://opencircuitdesign.com/netgen/