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

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

Utility to display the HTTP headers returned by web-servers

https://github.com/bingos/furl

Fuse-based http filesystem

http://httpfs.sourceforge.net/

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

Mount NTFS partitions (read/write) and disk images

http://www.tuxera.com/community/open-source-ntfs-3g/

FUSE-based file system backed by Amazon S3

https://github.com/s3fs-fuse/s3fs-fuse

Mount remote directories over ssh

https://github.com/libfuse/sshfs

FUSE based implementation of the well-known unionfs

https://github.com/rpodgorny/unionfs-fuse

Popular virtual window manager for X

https://www.fvwm.org/

Blazing fast command-line fuzzy finder

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

Graphical Boot Manager

File and directory monitoring system

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

Freedesktop compliant menu library

https://www.xfce.org/

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

Eclipse Java Compiler used to build GCC Java

GNU Compiler Collection 10

https://gcc.gnu.org

GNU Compiler Collection 4.8

https://gcc.gnu.org

GNU Compiler Collection 7

https://gcc.gnu.org

GNU Compiler Collection 8

https://gcc.gnu.org

GNU Compiler Collection 9

https://gcc.gnu.org

Create dependencies in makefiles using 'gcc -M'

Gconf database editor for the GNOME 3 environment

Configuration database system for GNOME

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

GNU copy-in/out (cpio)

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

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 GDB of newer version than comes with the system

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

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/

Graphic library for GTK+

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/

Fast and lightweight GTK+ IDE

https://www.geany.org/

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

Graph based image processing framework

http://gegl.org/

Ukrainian KOI8 fonts for X11R6 (koi8-u)

Tool for generating a C function which parses command line arguments

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

Gentium Basic and Gentium Book Basic TrueType fonts

https://software.sil.org/gentium/

Gentium Plus TrueType font collection

https://software.sil.org/gentium/

Gtk+ based, file manager inspired by DirectoryOpus

http://www.obsession.se/gentoo/