Similar to KHTML

Ruby MRI

CrunchBang Linux

Csound

CTWM

CUBRID

CUPS

CuPy

CyanogenMod

Cyrus IMAP server

Darik's Boot and Nuke

DD-WRT

Deno (software)

Diff

Diff3

Discourse (software)

Docker (software)

Drupal

DSpace

DVD Flick

Device independent file format#DVI-to-PDF converters

Dvips