BitTorrent Client written in C for FreeBSD and Linux

http://www.rahul.net/dholmes/ctorrent/

Automated unit testing framework for C

http://cunit.sourceforge.net/

Common UNIX Printing System: Server

http://www.cups.org/

Common UNIX Printing System: Library cups

http://www.cups.org/

Common UNIX Printing System: Library cupsimage

http://www.cups.org/

Postscript interpreter for CUPS printing to non-PS printers

http://www.cups.org/ghostscript.html

Non-interactive tool to get files from FTP, GOPHER, HTTP(S) servers

https://curl.se/ https://github.com/curl/curl

cvs-server only shell

Tutorial and reference for CVS

http://cvsbook.red-bean.com/

Utility to generate changelogs and reports from a CVS repository

http://cvschangelogb.sourceforge.net/

Graph the life story of a file under CVS or RCS

https://web.archive.org/web/20181111235708/http://www.akhphd.au.dk/~bertho/cvsgraph/

Create patchset information from CVS

http://cvsps.sourceforge.net/

CVS patchsets

http://www.cobite.com/cvsps/

WWW CGI script to browse CVS repository trees version 3

http://www.FreeBSD.org/projects/cvsweb.html

RFC 2222 SASL (Simple Authentication and Security Layer)

https://www.cyrusimap.org/sasl/

SASL authentication server for cyrus-sasl2

https://www.cyrusimap.org/sasl/

Compiler for Writing C Extensions for the Python Language

https://cython.org/

Damage extension headers

https://www.freedesktop.org/wiki/Software/xlibs/

Manipulate db(3)'s btree(3) and hash(3) databases - NetBSD port

http://cvsweb.netbsd.org/bsdweb.cgi/src/usr.bin/db/

Berkeley DB package, revision 4.8

http://www.oracle.com/us/products/database/berkeley-db/db/

Oracle Berkeley DB, revision 5.3

https://www.oracle.com/database/berkeley-db/db.html

Message bus system for inter-application communication

http://www.freedesktop.org/Software/dbus

GLib bindings for the D-BUS messaging system

https://www.freedesktop.org/wiki/Software/DBusBindings/

Configuration database system for GNOME

https://wiki.gnome.org/Projects/dconf

Update dynamic DNS entries

https://github.com/ddclient/ddclient

Bitstream Vera Fonts clone with a wider range of characters

https://dejavu-fonts.github.io/

Couple of command line utilities for working with desktop entries

https://www.freedesktop.org/wiki/Software/desktop-file-utils/

8086 development tools

http://homepage.ntlworld.com/robert.debath/

AMD and Intel CPUs microcode updates

Tool to effectively maintain todo lists aimed at developers

http://swapoff.org/devtodo.html

KAME DHCP6 client, server, and relay

http://wide-dhcpv6.sourceforge.net/

Decode and diagnose sniffed DHCP packets

http://www.mavetju.org/unix/general.php

Console Interface to configure ports

https://bitbucket.org/m1cro/d4p/

Simple english/german dictionary

http://www.de.freebsd.org/~wosch/dict/dict.cgi

GNU diff utilities

http://www.gnu.org/software/diffutils/diffutils.html

Open source video codec from the BBC

http://dirac.sourceforge.net/

Graphical diff tool

http://freecode.com/projects/dirdiff/

Extremely fast library for floating-point convolution

http://cr.yp.to/djbfft.html

FTP benchmark program

http://www.kegel.com/dkftpbench/

Portable debug memory allocation library

http://dmalloc.com/

X11 menu application designed for the dwm window manager

https://tools.suckless.org/dmenu

Tool for dumping DMI (SMBIOS) contents in human-readable format

https://www.nongnu.org/dmidecode/

DMX extension headers

http://www.freedesktop.org/wiki/Software/xlibs

Distributed.net distributed computing project client

http://www.distributed.net/

Meta-port for the different versions of the DocBook DTD

http://www.oasis-open.org/docbook/

V2.4.1 of the DocBook DTD, designed for technical documentation

http://www.oasis-open.org/docbook/

V3.0 of the DocBook DTD, designed for technical documentation

http://www.oasis-open.org/docbook/

V4.0 of the DocBook DTD, designed for technical documentation

http://www.oasis-open.org/docbook/

V4.1 of the DocBook DTD, designed for technical documentation

http://www.oasis-open.org/docbook/

V4.2 of the DocBook DTD, designed for technical documentation

http://www.oasis-open.org/docbook/