Similar to Stockfish

FIGlet

File System Visualizer

FindBugs

Firebird (database server)

Firestarter (firewall)

Firewalld

Flask (web framework)

Flatpak

Flutter (software)

FMSX

FOLIO (library services platform)

Fontconfig

FontForge

Foresight Linux

Fossil (software)

FreeS/WAN

FreeSBIE

Fsck

FuelPHP

FVWM