Similar to Pure_Data

Device independent file format#DVI-to-PDF converters

Dvips

Eclipse (software)

Elasticsearch

EGS (program)

Element (software)

Embedded GLIBC

Enigmail

ERP5

Mule (software)

Etherpad

Exa (command-line utility)

Exaile

Expr

EZ Publish

F-Spot

Falkon

Far Manager

Fetchmail

Fastest Fourier Transform in the West

FindBugs

Firebird (database server)

Firestarter (firewall)