A utility library that includes a wrapper for imlib2

http://www.linuxbrit.co.uk/giblib/

Tools and library routines for working with GIF images

https://sourceforge.net/projects/giflib/

Manipulates GIF images and animations

http://www.lcdf.org/gifsicle/

GIO bindings not available in gtk-sharp

http://github.com/mono/gio-sharp

Distributed source code management tool

https://git-scm.com/

GitHub Enterprise Backup Utilities

https://github.com/github/backup-utils

GNOME Javascript binding

http://live.gnome.org/Gjs

Graphical frontend to su

http://www.gnu.org/non-gnu/gksu/

Program to create labels and business cards

http://snaught.com/glabels/

User interface builder for GTK+ 3

https://glade.gnome.org/

User interface builder for GTK+/GNOME

http://glade.gnome.org/

OpenGL spinning pocket watch demo and benchmark utility

GL Tubing and Extrusion Library

https://linas.org/gle/

OpenGL Extension Wrangler Library

http://glew.sourceforge.net/

Network-related giomodules for glib

Some useful routines of C programming (previous stable version)

http://www.gtk.org/

Some useful routines of C programming (current stable version)

https://www.gtk.org/

Programming reference for devel/glib20

https://www.gtk.org/

C++ interfaces for glib2

https://www.gtkmm.org/

OpenGL image compositing library

http://freedesktop.org/Software/glitz

GLX extension headers

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

GNU version of 'make' utility

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

Minimalist version of gnu make

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

Well-known mastermind game

http://gap.nongnu.org/gmastermind/

Library (written in C) for parsing and creating messages using MIME

http://spruce.sourceforge.net/gmime/

Library (written in C) for parsing and creating messages using MIME

http://spruce.sourceforge.net/gmime/

Library (written in C) for parsing and creating messages using MIME

http://spruce.sourceforge.net/gmime/

Well-known minesweeper game for GNUstep

https://gap.nongnu.org/gmines/

A generic matrix template library

http://home.gna.org/getfem/

Free library for arbitrary precision arithmetic

https://gmplib.org/

Gecko Media Plugins API from mozilla-release

https://wiki.mozilla.org/GeckoMediaPlugins

GNATS, the GNU Problem Report Management System

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

Simple network library built upon Glib-2

http://www.gnetlibrary.org/

Sound files for use with GNOME 2

Collection of backgrounds for GNOME

Clocks for GNOME 3

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

Session framework for the GNOME desktop to manage color profiles

https://git.gnome.org/browse/gnome-color-manager

Common automake macros for GNOME 3

https://www.gnome.org/

Contacts manager for gnome

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

Additional UI API for GNOME

https://www.gnome.org/

Programming reference for x11/gnome-desktop

http://www.gnome.org/

GNOME 3 dictionary lookup application

https://wiki.gnome.org/Dictionary

GNOME doc utils

Document manager application designed to work with GNOME 3

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

GNOME 3 font viewer utility

https://github.com/GNOME/gnome-font-viewer

Collection of icons for the GNOME desktop

Additional collection of icons for the GNOME desktop

GNOME Symbolic Icons

GNOME JavaScript common modules and tests

Program that keeps passwords and other secrets