PyleWiki is a WikiClone written entirely in Python that allows a group of people to collaboratively edit a tree of webpages using nothing but their browser and a simple, text-based markup language. This particular WikiClone has a few extensions to the original: attachments to pages, user authentication (primitive), and the use of templates for page styling among others.
rest2web is a tool for automatically maintaining Web sites or parts of Web sites. It integrates with docutils so that contents can be kept in reStructured Text or HTML. It has a powerful templating and macro system and can automatically generate index pages and navigation trails (like sidebars and breadcrumbs). It generates static HTML and can generate relative links, which means that sites can be viewed from the filesystem. A "uservalues" system assists with creating sites in multiple languages.
Rundoc is an Ant task designed to help with the single- sourcing of program documentation. This task replaces special commands embedded within text files with their output in a specified format. Currently, only Docbook format is supported. It was written to keep sample code output in program documentation synchronized with the actual output of the current code, by running the referenced code when the documentation is built.
Rute (Rute Users Tutorial and Exposition) is a book on GNU/Linux that aims to be the definitive guide for new users as well as sufficing as training course material, covering both the RHCE and LPI requirements. It covers essential theory to UNIX as well as giving practical tutorials on all fundamental aspects of Unix administration, from basic commands, the theory of TCP/IP, the Linux filesystem, through to configuration of mail, DNS, and other servers, through hardware configuration and package management. It is not Unix-specific but tends to give examples suited to Debian and RedHat-like systems. Rute comes in HTML and PDF formats.
Seetxt is a lightweight text file and man page viewer for X windows. It maintains "document meta-data" for each user, allowing them to automatically keep bookmarks and highlights for read-only system files. It also has a "server mode" so that command line requests can be sent to a single running server rather than starting multiple instances. Other features include hypertext-style apropos (man page) searches, file monitoring, multi-level regular expression searching, a command history, and nice little toggle lights on the interface for the server and file monitor. There's also cross-application drag-n-drop support, and handy little features that allow you to view the output of shell commands and process the text buffer with an external command (sed, awk, grep, perl, etc.) Seetxt is POSIX compliant.