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/

D-Bus service that provides location information

https://gitlab.freedesktop.org/geoclue/geoclue/wikis/home

getopt(1) replacement that supports GNU-style long options

http://software.frodo.looijaard.name/getopt/

Check the validity and consistency of PO and POT files

http://gettext-lint.sourceforge.net/

Alter gettext po files in special ways

https://src.fedoraproject.org/rpms/gettext/blob/master/f/msghack.py

GNU gettext runtime libraries and programs

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

GNU gettext development and translation tools

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

The GGZ Gaming Zone - Core Client Libraries

http://www.ggzgamingzone.org/

Ghostscript 8.x PostScript interpreter

http://www.cs.wisc.edu/~ghost/doc/GPL/index.htm

Ghostscript 8.x PostScript interpreter

http://www.cs.wisc.edu/~ghost/doc/GPL/index.htm

Tools and library routines for working with GIF images

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

Manipulates GIF images and animations

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

Distributed source code management tool

https://git-scm.com/

GitHub Enterprise Backup Utilities

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

OpenGL spinning pocket watch demo and benchmark utility

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/

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

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/

A generic matrix template library

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

Free library for arbitrary precision arithmetic

https://gmplib.org/

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

Implementation of the FreeDesktop Desktop Menu Spec

http://www.freedesktop.org/Standards/menu-spec

MIME and Application database for GNOME

https://www.gnome.org/

utmp/wtmp/lastlog helper program for the vte Terminal widget

http://www.gnome.org/

GNOME text-to-speech API

http://live.gnome.org/Orca/GnomeSpeech

GNOME 3 users guide

Common startup and shutdown subroutines used by GNOME scripts

Utility port that creates the GNOME directory tree

The game of Go

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

GNU grep

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

The GNU Privacy Guard

https://www.gnupg.org/

GNUstep makefile package

http://www.gnustep.org/

GNU Transport Layer Security library

https://gnutls.org/

Generate interface introspection data for GObject libraries

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

Fast, multi-threaded malloc() and nifty performance analysis tools

https://github.com/gperftools/gperftools

Script to analyze web server and generate Google Sitemap files

http://code.google.com/p/sitemap-generators/

Visual effects library

http://sourceforge.net/projects/goom