Similar to Zlib

Device independent file format#DVI-to-PDF converters

Dvips

Eclipse (software)

EGS (program)

Element (software)

Enigmail

Erlang (programming language)

Mule (software)

Etherpad

Exaile

Expr

EZ Publish

F-Spot

Falkon

Far Manager

Fastest Fourier Transform in the West

Firebird (database server)

Firewalld

Flask (web framework)

FLTK

Flutter (software)

FMSX