X.Org miscellaneous Sun fonts

https://www.x.org/

Math companion for the TeX Gyre Bonum family

http://www.gust.org.pl/projects/e-foundry/tg-math

Math companion for the TeX Gyre Pagella family

http://www.gust.org.pl/projects/e-foundry/tg-math

Math companion for the TeX Gyre Schola family

http://www.gust.org.pl/projects/e-foundry/tg-math

Math companion for the TeX Gyre Termes family

http://www.gust.org.pl/projects/e-foundry/tg-math

Create an index of X font files in a directory

https://www.x.org/

X.Org Winitzki Cyrillic font

https://www.x.org/

X.Org XFree86 Type1 font

https://www.x.org/

XML-based font configuration API for X Windows

https://www.freedesktop.org/wiki/Software/fontconfig/

Type 1/TrueType/OpenType/bitmap font editor

https://fontforge.org/

Very customizable and minimal font previewer written in Bash

https://github.com/sdushantha/fontpreview

The Lohit family of Indic fonts

http://fedoraproject.org/wiki/Lohit

Wrap a bitmap font in a sftn wrapper

https://www.x.org/

Database for integrating printer drivers with common spoolers

http://www.linuxfoundation.org/collaborate/workgroups/openprinting/database/foomatic

Foomatic database engine

http://www.linuxprinting.org/foomatic.html

Foomatic data for the HPIJS printer drivers

http://www.linuxprinting.org

Print formatter driven by XSL formatting

https://xmlgraphics.apache.org/fop/

Graphical front-end to the command-line BSD fortune

http://www.orange-carb.org/~csaldanh/software.html

Graph management system for GNUstep

http://FortyTwo.sourceforge.net/index.html

Interface to Berkeley DB for GNUstep

http://fortytwo.sourceforge.net/

Utility classes for GNUstep

http://fortytwo.sourceforge.net/

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

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

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/

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

http://www.freetype.org/

Free and portable TrueType font rendering engine

https://www.freetype.org/

Minimalistic plugin API for video effects

https://frei0r.dyne.org/

Free Implementation of the Unicode Bidirectional Algorithm

http://fribidi.org/

Freenet client that provides messenger and file services

http://jtcfrost.sourceforge.net/

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

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

Utility to display the HTTP headers returned by web-servers

https://github.com/bingos/furl

Fuse-based http filesystem

http://httpfs.sourceforge.net/

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

Mount NTFS partitions (read/write) and disk images

http://www.tuxera.com/community/open-source-ntfs-3g/