Flight of the Amazon Queen: a classic graphical adventure

http://www.scummvm.org

Make lines of the same color

https://wiki.gnome.org/Apps/Four-in-a-row

Fast and extensive C++ GUI toolkit -- ver.1.6

http://www.fox-toolkit.org/fox.html

Free Pascal compiler Adobe Acrobat(tm) documentation

https://www.freepascal.org/

Free Pascal compiler with Turbo and Delphi compatibility (source)

https://www.freepascal.org/

Free PHP class to generate PDF files with pure PHP

http://www.fpdf.org/

Quickly ping N hosts w/o flooding the network

http://www.fping.org/

The OpenAL Utility Toolkit

http://connect.creativelabs.com/openal/default.aspx

FreeBSD ftpd

https://github.com/cschuber/freebsd-ftpd

FreeBSD shar

https://github.com/cschuber/freebsd-shar

FreeBSD 12.4-RELEASE amd64 sysroot

https://www.FreeBSD.org/

FreeBSD telnetd

https://github.com/cschuber/freebsd-telnet

FreeBSD-modified Taylor UUCP (unix-to-unix copy program)

https://github.com/dinoex/freebsd-uucp/

Open source framework for solving Freecell

https://fc-solve.shlomifish.org/

Free turn-based multiplayer strategy

https://www.freeciv.org/

Free turn-based multiplayer strategy

https://www.freeciv.org/

Displays free memory as a bargraph

http://www.rkeene.org/oss/freecolor/

Sound theme based on the FreeDesktop specification

http://freedesktop.org/wiki/Specifications/sound-theme-spec

Free UCS Outline Fonts

http://www.nongnu.org/freefont/

Collection of ATM fonts (not all free) from the CICA archives

Open source implementation of the GLUT library

http://freeglut.sourceforge.net/

Simple C/C++ bitmap graphics library

http://freeimage.sourceforge.net/

Library and tools to support IPMI-capable hardware

https://www.gnu.org/software/freeipmi/ https://savannah.gnu.org/projects/freeipmi/

Free JIS X 4081 (subset of EPWING V1) Formatter

http://www.sra.co.jp/people/m-kasahr/freepwing/

Free implementation of Remote Desktop Protocol

http://www.freerdp.com

TAR archiver for GNUstep

https://gna.org/projects/freetar/

Sybase/Microsoft TDS protocol library

http://www.freetds.org/

Free and portable TrueType font rendering engine

https://www.freetype.org/

Library to extract valid data from within an Excel (.xls) spreadsheet

https://www.gaia-gis.it/fossil/freexl/index

Minimalistic plugin API for video effects

https://frei0r.dyne.org/

The "meta-port" for frei0r and additional plugins

https://frei0r.dyne.org/

Frei0r cairo plugins

https://frei0r.dyne.org/

Frei0r gavl plugins

https://frei0r.dyne.org/

Frei0r OpenCV plugins

https://frei0r.dyne.org/

Free Implementation of the Unicode Bidirectional Algorithm

http://fribidi.org/

IP routing protocol suite including BGP, IS-IS, OSPF and RIP

https://frrouting.org/

Provide configuration reload functionality for FRR

https://frrouting.org/

Functional and object-oriented language for the .NET platform

http://fsharp.org/

List fonts served by the X font server

https://www.x.org/

Generate BDF font from X font server

https://gitlab.freedesktop.org/xorg/app/fstobdf

Implementation of the Frame Streams data transport protocol in C

https://github.com/farsightsec/fstrm

Detect which filesystem type a device/partition contains

http://nchc.dl.sourceforge.net/sourceforge/fstyp/

Cross-platform file change monitor

https://github.com/emcrisostomo/fswatch

Command line FTP tools for listing and mirroring

https://www.ohse.de/uwe/ftpcopy.html

Synchronizes a local and a remote FTP directory trees

http://www.clazzes.org/ftpsync

Abbreviation (alphabet-->Japanese) dictionary (EPWING V1 format)

http://openlab.ring.gr.jp/edict/fpw/

Utility to display the HTTP headers returned by web-servers

https://github.com/bingos/furl

FUSE allows filesystem implementation in userspace

https://github.com/libfuse/libfuse

FUSE library version 3 for filesystems implemented in userspace

https://github.com/libfuse/libfuse

Popular virtual window manager for X

https://www.fvwm.org/