List fonts served by the X font server

https://www.x.org/

Generate BDF font from X font server

https://gitlab.freedesktop.org/xorg/app/fstobdf

Implementation of the Frame Streams data transport protocol in C

https://github.com/farsightsec/fstrm

Detect which filesystem type a device/partition contains

http://nchc.dl.sourceforge.net/sourceforge/fstyp/

Cross-platform file change monitor

https://github.com/emcrisostomo/fswatch

Command line FTP tools for listing and mirroring

https://www.ohse.de/uwe/ftpcopy.html

Synchronizes a local and a remote FTP directory trees

http://www.clazzes.org/ftpsync

Abbreviation (alphabet-->Japanese) dictionary (EPWING V1 format)

http://openlab.ring.gr.jp/edict/fpw/

Utility to display the HTTP headers returned by web-servers

https://github.com/bingos/furl

FUSE allows filesystem implementation in userspace

https://github.com/libfuse/libfuse

FUSE library version 3 for filesystems implemented in userspace

https://github.com/libfuse/libfuse

Popular virtual window manager for X

https://www.fvwm.org/

C/C++ header-only library for division via FP inverse multiplication

https://github.com/Maratyszcza/FXdiv

Blazing fast command-line fuzzy finder

https://github.com/junegunn/fzf/

File and directory monitoring system

http://www.gnome.org/~veillard/gamin/index.html

Adjust the color temperature of your screen

https://gitlab.com/chinstrap/gammastep

Freedesktop compliant menu library

https://www.xfce.org/

Library for handling uncompressed video and audio data

https://gmerlin.sourceforge.net/

GNU version of Awk

http://www.gnu.org/software/gawk/gawk.html

GTK2 bitmap font editor

http://sofia.nmsu.edu/~mleisher/Software/gbdfed/

GObject library to create cabinet files

https://wiki.gnome.org/msitools

Meta-port for the default version of the GNU Compiler Collection

https://gcc.gnu.org

GNU Compiler Collection 12

https://gcc.gnu.org

GNU Compiler Collection 13

https://gcc.gnu.org

GNU Compiler Collection 14

https://gcc.gnu.org

GNU Compiler Collection 15

https://gcc.gnu.org

Create dependencies in makefiles using 'gcc -M'

C++ header-only library for Generalized Constant Expression Math

https://gcem.readthedocs.io/en/latest/

Gconf database editor for the GNOME 3 environment

Configuration database system for GNOME

http://www.gnome.org/projects/gconf/

C++ wrapper for gconf2 API library

http://gtkmm.sourceforge.net/

GNU copy-in/out (cpio)

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

Library for bits of crypto UI and parsing

https://live.gnome.org/GnomeKeyring

Library for bits of crypto UI and parsing

https://live.gnome.org/GnomeKeyring

Graphics library for fast creation of images

https://libgd.github.io/

GNU database manager

https://www.gnu.org.ua/software/gdbm/

Easy to use fast C API for creating charts and graphs

http://www.fred.net/brv/chart/

Grassroots DICOM library

https://gdcm.sourceforge.net/

gdk-pixbuf extra loaders for niche and seldom-used image formats

https://gitlab.gnome.org/ebassi/gdk-pixbuf-extra

Graphic library for GTK+

https://developer.gnome.org/gdk-pixbuf/

deprecated API for integrating Xlib and GdkPixbuf

https://developer.gnome.org/gdk-pixbuf/

Components intended to be shared between GNOME development tools

https://www.gnome.org/

GNOME 3 display manager

http://www.gnome.org/projects/gdm/

Gnome DOM Engine

http://gdome2.cs.unibo.it/

GDS2 stream file to Postscript and HP/GL converter

Fast and lightweight GTK+ IDE

https://www.geany.org/

SMS / GG emulator

Small but powerful text editor for GNOME 3 Desktop Environment

http://www.gnome.org/projects/gedit/

Plugins for GEdit 3

https://wiki.gnome.org/Apps/Gedit/PluginsLists

Lightweight image viewer forked from GQview

https://www.geeqie.org/