Similar to Graphviz

Device independent file format#DVI-to-PDF converters

Dvips

Eclipse (software)

Elasticsearch

EGS (program)

Emacs

Enlightened Sound Daemon

Erlang (programming language)

ERP5

Mule (software)

Etherpad

Euler Mathematical Toolbox

Exa (command-line utility)

Exaile

XMPP

EZ Publish

Far Manager

Fast Library for Number Theory

Fetchmail

FFmpeg

FFTW

Filesystem in Userspace

FindBugs