Similar to Zlib

Foliate (software)

FOLIO (library services platform)

Foresight Linux

Free Pascal

FreeBASIC

FreeSBIE

Fsck

FuelPHP

FVWM

Galaxy (computational biology)

GConf

Gentoo Linux

Gfarm file system

GNU Fortran

Ghostscript

GiNaC

GKrellM

Glasgow Haskell Compiler

GNOME Display Manager

GNU Aspell

GNU Binutils