CPU identification utility

http://www.ka9q.net/code/cpuid/

Password-checking library

https://sourceforge.net/projects/cracklib/

Interactive C program browser

http://cscope.sourceforge.net/

Feature-filled tagfile generator for vi and emacs clones

http://ctags.sourceforge.net/

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: Library cups

http://www.cups.org/

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/

Create patchset information from CVS

http://cvsps.sourceforge.net/

CVS patchsets

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

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

Update dynamic DNS entries

https://github.com/ddclient/ddclient

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/

GNU diff utilities

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

Open source video codec from the BBC

http://dirac.sourceforge.net/

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/

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/

DocBook/SGML DTD V4.3, designed for technical documentation

http://www.docbook.org/sgml/4.3/index.html

DocBook/SGML DTD V4.5, designed for technical documentation

http://www.docbook.org/specs/docbook-4.5-spec-cs-01.html

DocBook SGML DTD

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

XML version of the DocBook DTD version controlled for ScrollKeeper

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

DocBook XML DTD

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

DocBook/XML DTD V4.3, designed for technical documentation

http://www.docbook.org/xml/4.3/index.html

DocBook/XML DTD V4.4, designed for technical documentation

http://www.docbook.org/xml/4.4/index.html

DocBook/XML DTD V4.5, designed for technical documentation

http://www.docbook.org/xml/4.5/index.html

DocBook W3C XML Schema

https://www.oasis-open.org/docbook/xmlschema/1.0b1/

XSL DocBook stylesheets

http://docbook.sourceforge.net/projects/xsl/

Emacs lisp modules for editing DocBook documents

http://nwalsh.com/emacs/docbookide/

DOCSIS(tm) binary configuration file encoder/decoder

https://github.com/rlaager/docsis

Secure, fast and powerful IMAP and POP3 server

http://www.dovecot.org/