Similar to GNU_LilyPond

Dvd+rw-tools

Device independent file format#DVI-to-PDF converters

Dvips

Eclipse (software)

Elasticsearch

EGS (program)

Emacs

Embedded GLIBC

Enlightened Sound Daemon

Erlang (programming language)

ERP5

Mule (software)

Etherpad

Euler Mathematical Toolbox

GNOME Evolution

Exa (command-line utility)

Exaile

EZ Publish

F-Spot

Fast Library for Number Theory

Fetchmail

FFmpeg

Fastest Fourier Transform in the West