Emacs lisp modules for editing DocBook documents

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

DOCSIS(tm) binary configuration file encoder/decoder

https://github.com/rlaager/docsis

Command-line DNS client

https://dns.lookup.dog/

DNS-over-HTTP server proxy

https://github.com/jedisct1/rust-doh

Doom data files (Doom, Doom II, Hexen, Heretic and Strife)

Complete Doom-based game IWAD that is Free Software

http://freedoom.sf.net/

Improved and extended version of Doom

http://doomlegacy.sourceforge.net/

DOS/Mac to Unix and vice versa text file format converter

https://waterlan.home.xs4all.nl/dos2unix.html

Emulator of a PC with DOS

http://dosbox.sourceforge.net/

Simple, powerful configuration-file parser

https://github.com/williamh/dotconf

Binary-decimal and decimal-binary routines for IEEE doubles

https://github.com/google/double-conversion

Doulos SIL TrueType font collection

http://scripts.sil.org/cms/scripts/page.php?item_id=DoulosSILfont

Doulos SIL TrueType font collection, compact variant

http://scripts.sil.org/cms/scripts/page.php?item_id=DoulosSILfont

Secure, fast and powerful IMAP and POP3 server

https://www.dovecot.org/

Sieve plugin for the Dovecot 'deliver' LDA and LMTP

https://wiki2.dovecot.org/Pigeonhole

Documentation system for C, C++, and other languages

https://www.doxygen.org/

Library for compressing and decompressing 3D meshes and point clouds

https://google.github.io/draco/

DRM modules for the linuxkpi-based KMS components

https://github.com/freebsd/drm-kmod

The Droid typeface family

https://www.droidfonts.com/

Database driven web content management system (CMS)

https://www.drupal.org/

Database driven web content management system (CMS)

https://www.drupal.org/

Database driven web content management system (CMS)

https://www.drupal.org/

Qt client for DSBMD that lets you mount media, and more

https://github.com/mrclksr/DSBMC

Command-line client for DSBMD

https://freeshell.de/~mk/projects/dsbmc-cli.html

Media mounting daemon

https://github.com/mrclksr/DSBMD

API for audio processing plugins

http://dssi.sourceforge.net/

DSSSL stylesheets for the DocBook DTD by Norman Walsh

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

Device Tree Compiler

https://git.kernel.org/cgit/utils/dtc/dtc.git

Spawns dhclients for a dual-stack network

Embeddable Javascript engine

https://duktape.org/

Embeddable Javascript engine (shared lib)

https://duktape.org/

Python implementation of the Git file formats and protocols

https://www.dulwich.io/

English to Thai dictionary for GNUstep

http://www.eskimo.com/~pburns/Dictionaries/

Duo unix integration package

http://duosecurity.com

Backup tool that uses librsync and GnuPG

http://duplicity.nongnu.org

Shell front end for the duplicity backup tool

http://duply.net

DVD burning software

http://fy.chalmers.se/~appro/linux/DVD+RW/

Backup content from DVD to hard disk

http://dvdbackup.sourceforge.net/

Utilities & library to manipulate ext2/3/4 filesystems

http://e2fsprogs.sourceforge.net/

Utilities & library to manipulate ext2/3/4 filesystems

http://e2fsprogs.sourceforge.net/

Blkid library from e2fsprogs package

http://e2fsprogs.sourceforge.net/

UUID library from e2fsprogs package

http://e2fsprogs.sourceforge.net/

Utilities to manipulate files in an ext2/ext3 filesystem

https://e2tools.github.io/

EFL DBUS connectivity library

http://docs.enlightenment.org/api/e_dbus/html/

Small RSA key management package based on openssl

https://github.com/OpenVPN/easy-rsa

GNUstep graphical diff

Accessing and converting various ebook file formats

https://sourceforge.net/projects/ebook-tools/

Exposes information about NVMe disks on EC2

https://github.com/cperciva/ebsnvme-id

Startup scripts for FreeBSD/EC2 environment

http://www.daemonology.net/freebsd-on-ec2/

Scientific calcultor for GNUstep

http://www.eskimo.com/~pburns/EdenMath/