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Etherpad

Euler Mathematical Toolbox

GNOME Evolution

Exa (command-line utility)

Exaile

Expr

F-Spot

Falkon

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Ffdshow

FFmpeg

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FIGlet

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FindBugs

Firebird (database server)

Firestarter (firewall)

Firewalld

Flask (web framework)

Flatpak

FLTK