Randr extension headers

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

RDF Parser Toolkit for Redland

http://librdf.org/raptor/

File archiver (binary port)

https://www.rarlab.com/

OMF help system based on the Freedesktop specification

https://rarian.freedesktop.org/

Simple window manager with no fat library dependencies

https://www.nongnu.org/ratpoison/

Distributed, collaborative, spam detection and filtering network

http://razor.sourceforge.net/

Unix incarnation of the plan9 shell

http://tobold.org/article/rc

Checks rc scripts for style and common errors

https://github.com/crees/rclint

Version control system (as was in FreeBSD prior to removal)

http://www.gnu.org/software/rcs/

RDP client for Windows NT/2000/2003 Terminal Server

http://www.rdesktop.org/

Fast C++ regex library

https://github.com/google/re2

Lexer generator for C, C++ and Go with a focus on generating fast code

https://re2c.org/

Library for editing command lines as they are typed

https://tiswww.case.edu/php/chet/readline/rltop.html

RECORD extension headers

http://www.freedesktop.org/wiki/Software/xlibs

RenderProto protocol headers

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

Resource extension headers

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

A fast redirector and access controller for squid

http://www.bsdnexus.com/retsina/index.htm

Uncompile an rgb color-name database

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

Fully skinnable XHTML/CSS webmail written in PHP

https://roundcube.net/

Convert .rpm files to cpio format

The RPM Package Manager

https://rpm.org/

Round Robin Database Tools

http://www.rrdtool.org/

Restricted Secure SHell only for sftp or/and scp

http://www.pizzashack.org/rssh/index.shtml

Sample implementation of a Remote Start client

Network file distribution/synchronization utility

http://rsync.samba.org/

Kernel module which provides /dev/rtc device support

Ruby interface to Oracle Berkeley DB revision 2 or later

https://github.com/knu/ruby-bdb

Ruby interface to Berkeley DB revision 1.8x with full feature support

http://moulon.inra.fr/ruby/bdb1.html

Ruby tool for converting wiki-like markup

http://deplate.sourceforge.net

Binary data dumper module for Ruby

http://www.geocities.co.jp/SiliconValley-Oakland/2986/

An object-oriented interpreted scripting language

http://www.ruby-lang.org/en/

Low memory usage xterm replacement that supports color

Security Administrator's Integrated Network Tool

http://www.wwdsi.com/saint/

Shared lib from the samba package

http://www.samba.org/

nsupdate utility with the GSS-TSIG support

https://www.isc.org/software/bind

Samba "ftp-like" client

http://www.samba.org/

API for access to scanners, digitals camera, frame grabbers etc

http://www.sane-project.org/

Stand-Alone shell combining many common utilities

http://members.tip.net.au/~dbell/

Scan_ffs recovers lost disklabel

High-speed Dirac codec

http://www.diracvideo.org/

ANSI C version of the SciMark2 benchmark

https://math.nist.gov/scimark2/download_c.html

Build tool alternative to make

https://scons.org/

Tiny shell that only permits scp and sftp

https://github.com/scponly/scponly/wiki

Converts the output of "vidcontrol -p" to PNG

Converts the output of "vidcontrol -p" to text

Multi-screen window manager

http://www.gnu.org/software/screen/

Small and lightweight screen(1) wrapper

https://sourceforge.net/projects/screenie/

Various X related scripts

https://cgit.freedesktop.org/xorg/app/scripts

ScrnSaver extension headers

http://www.freedesktop.org/wiki/Software/xlibs

Open Document Cataloging Project

http://scrollkeeper.sourceforge.net/