Similar to GStreamer

Enigmail

Enlightened Sound Daemon

Evince

Exaile

Ffdshow

FIGlet

File System Visualizer

Flask (web framework)

FontForge

Foresight Linux

FreeMind

Freeplane

FreeSBIE

Frescobaldi (software)

Git

GNOME

GNOME Display Manager

GNU Go

GNU GRUB

GNU Privacy Guard

GNU Radio

GNU Screen

Gnuzilla

Google Guice

Gpg4win

Graphviz