relman is a tool that takes your source code, runs the build, and distributes the packages. A configuration file allows you to define application-wide defaults in addition to information particular to individual projects such as the source directory, package name, and the like. Once set up, you just have to call relman with the name given to the project plus the version to release. It calls pkgmake to build .tar.gz, .deb, and .rpm files, and then distributes them using (s)FTP, RSync, and/or SCP all in one run.
repomirror is a tool to create local mirrors (partial or complete) of Linux distributions and repositories. It currently support Debian derivatives (both apt and simple repositories) and yum repositories. It has been tested with Debian, Fedora, CentOS, openSUSE, and OpenWrt feeds. It is also able to build repositories for local packages, although currently in a very limited fashion.
rfc868server is a time/date server for rfc868 clients such as rdate. Normally, this service is provided by other packages such as xinetd. On some newer systems, xinetd is not used, so this can be used instead. The server implements only the TCP/IP protocol, not the UDP one. The package contains server source, rc control scripts, and a man page.
Rig3 is a photo blog system that generates static HTML pages from a collection of pictures and text files. It uses the file system to dictate the structure. Each post can be an individual file, a directory with text and a list of images, or an Izumi blog entry. A wiki-like text syntax is supported. Monthly and index pages are generated along with an Atom feed per category. It can scale reasonably well for a moderate personal photo collection with tens of thousands of pictures.
rlimit is a program that lets you run processes with system resource limits set. It can be used by software developers and testers to test that software will run correctly in resource restricted environments. It is also useful for software which would otherwise consume excessive resources such as programs that used 100% CPU, set their own priority levels, or consume too much memory. This is basically a command line interface to the system functions getrlimit() and setrlimit().
robonobo is social music sharing and downloading software. It allows you to share your friends' music libraries and playlists, stream the audio instantly, and download the file in the background so you can burn it, export it to your music player, or do whatever you want with it. You can import your friends list and share links to your playlists via Facebook and Twitter.
rpi_gpio_ntp enables you to connect a GPS module with a PPS signal (or any other PPS source) to a Raspberry Pi, then sync the local clock using NTP. This can give you very accurate timekeeping. When you use this program, you do not need to patch the kernel to get PPS support, and do not need to patch the NTP program.