GNU TeXmacs (FSF GNU project)
GNU GRUB - GNU Project
Site for GNU GRUB
Bash - GNU Project
GNU MP Bignum Library
Wget - GNU Project
GNUnet
GNU's framework for secure p2p networking
GNUstep.org
GnuCash
GnuCash is personal and small-business financial-accounting software, freely licensed under the GNU GPL and available for GNU/Linux, BSD, Solaris, Mac OS X and Microsoft Windows.
Nano Editor
GNU nano is a small editor for on the terminal. It supports syntax highlighting, spell checking, justifying, completion, undo/redo...
GNU Guix
Guix is an advanced distribution of the GNU operating system. Guix is technology that respects the freedom of computer users. You are free to run the system for any purpose, study how it works, improve it, and share it with the whole world.
GNU Emacs
GCC - GNU Compiler Collection
MediaGoblin
GNU PG
GnuPG is a free implementation of OpenPGP
Jami.net
Jami - the distributed and open source communication platform
GIMP
GIMP - The GNU Image Manipulation Program: The Free and Open Source Image Editor