Similar to Metacity

Euler Mathematical Toolbox

Fast Library for Number Theory

FFmpeg

Filesystem in Userspace

Flask (web framework)

Flatpak

Fontconfig

Foresight Linux

Fossil (software)

FreeMat

FreeSBIE

FVWM

GD Graphics Library

Geany

GIMP

GNOME Display Manager

GNU Core Utilities

GNU Emacs

GNU Go

GNU Privacy Guard

GNU Radio

GNU Readline

GNU Scientific Library

GNU Screen

Glibc

Gnuplot