Accessing and converting various ebook file formats

https://sourceforge.net/projects/ebook-tools/

Scientific calcultor for GNUstep

http://www.eskimo.com/~pburns/EdenMath/

Dynamic resource editor for X Toolkit Applications

Fax send/receive program

Enlightenment Foundation Libraries

https://docs.enlightenment.org/efl/current/

D-Bus bindings for GObject

http://cgit.freedesktop.org/~david/eggdbus

Lightweight library for vector and matrix math

http://eigen.tuxfamily.org/

Lightweight library for vector and matrix math

http://eigen.tuxfamily.org/

A full-text search engine for Java

http://www.elasticsearch.org/

Simple widget toolkit using EFL

http://docs.enlightenment.org/auto/elementary/

Detect encoding of text files

http://gitorious.org/enca

Dictionary/spellchecking framework

http://www.abisource.com/projects/enchant/

X.Org Encoding fonts

https://www.x.org/

Artistic X window manager

https://www.enlightenment.org/

ASCII to PostScript filter

http://www.gnu.org/software/enscript/

ASCII to PostScript filter

http://www.gnu.org/software/enscript/

Free UNIX software/file packaging program

https://www.msweet.org/epm/

Functional programming language from Ericsson

https://www.erlang.org/

Extensible shell, derived from plan9's rc

http://wryun.github.io/es-shell/

The "easy shell", a small shell with Lisp-like syntax

Sound library for enlightenment package

http://www.tux.org/~ricdude/EsounD.html

Software speech synthesizer

http://espeak.sourceforge.net/

Additional loader for Evas (svg)

http://trac.enlightenment.org/e/wiki/Evas_Generic_Loaders

XEVIE extension headers

http://www.freedesktop.org/wiki/Software/xlibs

GNOME 3 multi-format document viewer without the GNOME dependancies

https://wiki.gnome.org/Apps/Evince

Port of Adobe XMP SDK to work on UNIX

http://libopenraw.freedesktop.org/wiki/Exempi

Command line utility to read and manipulate EXIF data

http://sourceforge.net/projects/libexif/

Exif, IPTC, and XMP metadata manipulation library and tools

https://www.exiv2.org/

XML 1.0 parser written in C

https://github.com/libexpat/libexpat

Application to track your expense under GNUstep

http://www.eskimo.com/~pburns/Expense/

Partition-selectable boot loader for IBM-PC/AT compatibles

http://extipl.sourceforge.jp/

Tool for extracting and creating optimised Xbox ISO images

http://sourceforge.net/projects/extract-xiso/

Update your host name on any dynamic DNS service

http://www.ez-ipupdate.com/

Framework to easily create, manipulate, and run BSD jails

http://erdgeist.org/arts/software/ezjail/

Fortran-to-C converter and its run-time libraries

http://www.netlib.org/

MPEG-2 and MPEG-4 AAC audio encoder

https://www.audiocoding.com/

MPEG-2 and MPEG-4 AAC audio decoder

https://github.com/knik0/faad2

File alteration monitor

http://oss.sgi.com/projects/fam/

version of JDK's `jar' command written entirely in C

http://fastjar.sourceforge.net/

FastCGI Development Kit

http://www.fastcgi.com/

CUI-based file and directory management tool

https://hp.vector.co.jp/authors/VA012337/soft/fd/

Batch mail retrieval utility for IMAP/POP3/ETRN/ODMR

https://www.fetchmail.info/

Foreign function call libraries

http://www.haible.de/bruno/packages-ffcall.html

Utility to recover UFS2 filesystems

https://BSDforge.com/projects/sysutils/ffs2recov/

Fast C routines to compute the Discrete Fourier Transform

http://www.fftw.org/

Fast Discrete Fourier Transform (Single Precision C Routines)

http://www.fftw.org/

Fast Discrete Fourier Transform (Long Double Precision C Routines)

http://www.fftw.org/

Integrated benchmark program

http://tromp.github.io/c4/fhour.html

GNU find utilities

https://www.gnu.org/software/findutils/

Remote firewall auditing tool

http://www.packetfactory.net/firewalk/