References for TeX and Friends is an ongoing project which provides a help file for LaTeX (and its friends like ConTeXt, Metapost, Metafont, etc.) using a state-of-the-art source format, DocBook/XML. Various output formats can be generated from the source file. Anyone can write a converter for any desired output format. Because the source file is XML, the easiest way to do this might be to use XSLT.
Shilosh OS provides a secure and stable operating system based on a highly modified Linux kernel, with its own package system similar to BSD's "ports", BSD Init scripts. Compatible with x86 and Power PC, it is also 99% compatible with Windows 9x. It is easy to use and includes complete documentation in many languages.
vtwatch automatically switches the active virtual console on your Linux system in a loop, acting as a virtual terminal surveillance monitor. The speed at which they switch is configurable, and it is possible to input a search string, which you are notified about if it is found on a console.
arch is a modern replacement for CVS, specifically designed for the distributed development needs of open source projects. It has uniquely good support for development on branches (especially good merging tools), distributed repositories (every developer can have branches in their own repository), changeset-oriented project management (arch commits changes to multiple files at once), and, of course, file and directory renaming.
Webtester is an application which is intended to be used in the testing and validation of Web-based applications. By reading an XML configuration file, the application is able to call URLs and use regular expressions to examine the results. Features include support for SSL, cookies, and variable assignment/substitution when sending and examining data.
The CDAY Calendar Almanac displays historical anniversaries such as birthdays and general events. It displays the equivalent date in multiple calendar systems, including Hebrew, Julian, JDNs, Great Underground Empire (Zork), Shire (Lord of the Rings), and Star dates. Separate GUI, command line, and Web-based versions are available, along with free libraries of thousands of events.
Zoem is a general-purpose macro/programming language that submits text to a two-stage transformation process. Macro expansion and interpretation is followed by application of customizable character filtering rules. Zoem supports inside-out evaluation, comprehensive IO, control operators, iteration, dictionary stacks, multidimensional data storage, arithmetic expressions, regular expressions, system commands, and more.