Icons starting with D

Dovecot

Dovetail

Downdetector

Doxygen

DPD

Dragonframe

Draugiem.lv

Dreamstime

Dribbble

Drizzle

Drone

Drooble

Dropbox

Drupal

DS Automobiles

DTS

DTube

Ducati

DuckDB

DuckDuckGo

Dungeons & Dragons

Dunked

Dunzo

Duolingo

Duplicati

DVC

dwm

Dynatrace

OWASP Dependency-Check