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/

File manager for the GNOME desktop

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

Brian Kernighan's pattern scanning and processing language

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

FTP client with advanced user interface

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

Ncurses Spotify client

https://github.com/hrkfdn/ncspot

Library for terminal-independent, full-screen output

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

Athena Widgets with N*XTSTEP appearance

http://siag.nu/neXtaw/

HTTP and WebDAV client library for Unix systems

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

Developer-targeted fonts with a high number of glyphs

https://nerdfonts.com/

Extendable SNMP implementation

http://net-snmp.sourceforge.net/

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/

Objective-C framework for socket programming with GNUstep

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

Dungeon explorin', slashin', hackin' game

http://www.nethack.org/

Dungeon explorin', slashin', hackin' game

http://www.nethack.org/

Network benchmark

http://www.ars.de/ars/ars.nsf/docs/netio/

Toolkit for conversion of images between different formats

http://netpbm.sourceforge.net/

Network performance benchmarking package

http://www.netperf.org/

Self-scaling network benchmark

http://bitspjoule.org/netpipe/

Lightweight web browser

http://www.netsurf-browser.org/

NetSurf project buildsystem

http://www.netsurf-browser.org/

Low-level cryptographic library

https://www.lysator.liu.se/~nisse/nettle/

Java NIO client server framework

https://netty.io/

Implementation of AT&T Research UNIX V8 newer(1)

Download news articles from NNTP server

Not Eriks Windowing Toolkit: console I/O handling library

https://fedorahosted.org/newt/

NeXtaw based replacement for xfontsel

http://www.netlab.is.tsukuba.ac.jp/~yokota/izumi/nexfontsel/

Personal cloud which runs on your own server

https://nextcloud.com

Classic Go game for OPENSTEP/GNUstep

https://www.nongnu.org/gap/nextgo/index.html

HTTP/2.0 C Library

https://nghttp2.org/

Robust and small WWW server

https://nginx.com/

Free open source daemon for Internet Relay Chat (IRC)

https://ngircd.barton.de/

Small build system closest in spirit to Make

https://ninja-build.org/

Console application which monitors network traffic in real time

http://www.roland-riegel.de/nload/

JSON library for Modern C++

https://nlohmann.github.io/json/

Port scanning utility for large networks

https://nmap.org/

Cleaned up MH mailer suite

http://savannah.nongnu.org/projects/nmh/

V8 JavaScript for client and server (meta port)

https://nodejs.org/ https://github.com/nodejs/node