Similar to CMU_Common_Lisp

Flask (web framework)

Flatpak

FLTK

Flutter (software)

FMSX

Foliate (software)

Fontconfig

FontForge

Foresight Linux

Fossil (software)

Free Pascal

FreeBASIC

FreeMat

FreeSBIE

Fsck

FuelPHP

FVWM

Galaxy (computational biology)

GConf

GD Graphics Library

Gentoo Linux