FTP client with advanced user interface

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

Library for terminal-independent, full-screen output

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

HTTP and WebDAV client library for Unix systems

http://www.webdav.org/neon/

Extendable SNMP implementation

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

File server for Mac OS X

http://netatalk.sourceforge.net/

Simple utility which reads and writes data across network connections

http://nc110.sourceforge.net/

Network benchmark

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

Network performance benchmarking package

http://www.netperf.org/

Self-scaling network benchmark

http://bitspjoule.org/netpipe/

Low-level cryptographic library

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

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/

Robust and small WWW server

https://nginx.com/

Free open source daemon for Internet Relay Chat (IRC)

https://ngircd.barton.de/

Netdev config analyzer

http://sourceforge.net/projects/nipper

Port scanning utility for large networks

https://nmap.org/

Cleaned up MH mailer suite

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

More functional native binary replacement for /sbin/nologin

Perform consistency checks on DNS zone files

http://ee.lbl.gov/ftp.html

Platform-neutral API for system level and libc like functions

https://developer.mozilla.org/docs/Mozilla/Projects/NSPR

RFC 2307 NSS module

http://www.padl.com/OSS/nss_ldap.html

Client/server program for testing network performance

Nutrition software to record what you eat

http://nut.sourceforge.net/

Development snapshot of the world-renown nvi editor

http://www.kotnet.org/~skimo/nvi/

Tool to manipulate X configuration files for the NVidia driver

http://www.nvidia.com/object/unix.html

Nils Weller's BSD-licensed C-compiler

http://nwcc.sourceforge.net/

Securely delete file[s]

Round clock application for X

Open DVD player that supports DVD menus

http://www.dtek.chalmers.se/~dvd/

Help you update your snort rules after each update

http://oinkmaster.sourceforge.net/

Regular expressions library compatible with POSIX/GNU/Perl

https://github.com/kkos/oniguruma

A BSDL Regular Expressions library compatible with POSIX/GNU/Perl

http://www.geocities.jp/kosako3/oniguruma/

Oniguruma is a regular expressions library

http://www.geocities.jp/kosako3/oniguruma/

Open-source COBOL compiler

http://www.opencobol.org/

3D positional spatialized sound library

http://www.openal.org/

Software implementation of the OpenAL specification

http://kcat.strangesoft.net/openal.html

Open Crypto Development Kit

http://www.gnutls.org/

OpenCORE implementation of AMR Narrowband & Wideband speech codec

http://sourceforge.net/projects/opencore-amr/

HBCI is a bank-independent homebanking standard

http://openhbci.sourceforge.net

Object-oriented SGML/XML parser toolkit and DSSSL engine

http://www.netfolder.com/DSSSL/

Open-source JPEG 2000 codec

https://www.openjpeg.org/

Open source LDAP client implementation

http://www.OpenLDAP.org/

Open source LDAP client implementation with SASL2 support

http://www.OpenLDAP.org/

Open source LDAP server implementation

http://www.OpenLDAP.org/

Open source LDAP client implementation

https://www.OpenLDAP.org/

Open source LDAP client implementation with SASL2 support

http://www.OpenLDAP.org/

Open source LDAP server implementation

https://www.OpenLDAP.org/

Open-source implementation of the Service Location Protocol

http://www.openslp.org/

This package is a collection of SGML/XML tools called OpenSP

http://openjade.sourceforge.net/doc/