Similar to QMK

Elvis (text editor)

Euler Mathematical Toolbox

Fast Library for Number Theory

FFmpeg

Filesystem in Userspace

Flatpak

Fontconfig

Fossil (software)

FreeBSD jail

FreeIPA

FreeMat

Fuchsia (operating system)

GD Graphics Library

Gforth

GIMP

GNOME

GNOME Boxes

GNOME Disks

GNOME Keyring

GNU Core Utilities

GNU Hello

GNU Multiple Precision Arithmetic Library

GNU Readline

Glibc

GNUnet

Gnuplot

GPAC Project on Advanced Content

GRASS GIS