Cinux is a Linux distribution that can be used as an educational platform for university students. Other than an educational platform, Cinux can be used as a platform to develop applications for Linux. Cinux includes tools useful for developing programming languages (with flex and bison) and kernels (with all the ordinary tools: gcc, nasm, yasm, make, etc.). Cinux is also able to replace the LFS live CD in order to build a Linux From Scratch distribution. Cinux also includes GNOME and dpkg, allowing it to be used as a desktop system.
fillrio.sh is a standalone shell script that loads random MP3 files to all available memory in your rio. The RIO utility is required to interface with the RIO hardware. Special features of this tool include the ability to recursively scan your music archive directories, specify search strings and add to what's already loaded.
The FReakSHell aims to be a sh-compatible shell and command language interpreter that has some advanced features that can not be found in other shells. It aims towards POSIX compliance by trying to implement the IEEE POSIX Shell and Tools specification (IEEE Working Group 1003.2). Advanced features include advanced job control (i.e. job exchange between different processes, dynamic repiping) and built-in auto-completion.
Listserv is software for managing mailing lists: creating lists, distributing emails over the list, adding new subscribers, and adjusting settings. It can be operated via a Web interface, by sending email commands, or via TCP. liblistserv is the glue between listserv and your C program for manipulating or querying a mailing list. By calling the provided functions, your program does not need to parse the results. Liblistserv is a reentrant library, written in C, meant for communication over TCP with a running Listserv instance.
Obsidian is an extensible virtual world system with a fullblown multiplayer client-server architecture. It is not a VRML2 world system, though there are plans to include VRML2 as a world data format. Note that active development on this system stopped a while ago, though the code is still available for the curious. The code may not even compile on current Linux or Irix systems.