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/

GObject-based wrapper around Exiv2 library

https://wiki.gnome.org/Projects/gexiv2

Library for multiplying polynomials over the binary field

https://gitlab.inria.fr/gf2x/gf2x

GObject library for Facebook Graph API

https://git.gnome.org/browse/libgfbgraph

Commandline flags module for C++

https://github.com/gflags/gflags

The GGZ Gaming Zone - Core Client Libraries

http://www.ggzgamingzone.org/

GitHub's official command line tool

https://cli.github.com

PostScript and PDF interpreter

https://ghostscript.com/

Ghostscript 8.x PostScript interpreter, base part

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

Ghostscript 8.x PostScript interpreter, X11 support

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

PostScript and PDF interpreter

https://ghostscript.com/

PostScript and PDF interpreter, X11 support

https://ghostscript.com/

Ghostscript 9.x PostScript interpreter, base part

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

Ghostscript 9.x PostScript interpreter, X11 support

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

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/

Frontend to easily manage filesystem connections

https://docs.xfce.org/apps/gigolo/start

The "meta-port" for The Gimp

https://www.gimp.org/

GNU Image Manipulation Program

https://www.gimp.org/

Collection of additional brushes and patterns files for GIMP

https://gimp.org

GutenPrint Printer Driver

http://gimp-print.sourceforge.net/

C source code reformatter

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

GIO bindings not available in gtk-sharp

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

Distributed source code management tool

https://git-scm.com/

Git command for automating fixup/autosquash commits

https://github.com/tummychow/git-absorb

Distributed, offline-first bug tracker embedded in git, with bridges

https://github.com/MichaelMure/git-bug

Command-line tool for working with Gerrit

https://godoc.org/golang.org/x/review/git-codereview

Sleek and powerful Git GUI

https://git-cola.github.io/

CVS emulation and import/export for git

https://git-scm.com/

Syntax-highlighting pager for git/diff

https://github.com/dandavison/delta

Sub-commands for repo summary, repl, changelog population, and more

https://github.com/tj/git-extras/

git filter-repo is a versatile tool for rewriting history

https://github.com/newren/git-filter-repo

Git GUI (Graphical User Interface) components

https://git-scm.com/

GitLab management commands for git CLI

https://invent.kde.org/sdk/git-lab

Git extension for versioning large files

https://git-lfs.github.com/

Git "merge" driver for GNU style ChangeLog files

https://www.gnu.org/software/vc-changelog/

GNU Emacs modes for Git-related files

https://github.com/magit/git-modes

Import from and submit to Perforce repositories using git

https://git-scm.com/

Git commands for navigating and editing Git commit history

https://github.com/ridiculousfish/git-prev-next

Git command for managing subrepositories

https://github.com/ingydotnet/git-subrepo

Bidirectional operation between a Subversion repository and Git

https://git-scm.com/

Util to keep branches in sync with remotes in git

https://github.com/ctubbsii/git-sync

Assorted git-related scripts and tools

https://github.com/MestreLion/git-tools

Compact self-hosted Git service

https://gitea.io/en-US/

GTK-based git repository viewer

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

GitHub Enterprise Backup Utilities

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