Similar to LibreCAD

Docker (software)

Dolphin (file manager)

Dragon Player

DSpace

Device independent file format#DVI-to-PDF converters

Dvips

EGS (program)

Emacs

Enigmail

Erlang (programming language)

Mule (software)

Etherpad

GNOME Evolution

Expr

EZ Publish

F-Spot

Fast Library for Number Theory

FFmpeg

Filesystem in Userspace