iMan is a man page viewer for Mac OS X. It provides a native Aqua interface as an alternative to the use of the man program via the Terminal. A variety of useful features have been implemented, including multiple viewing windows, viewing of man pages as well as any man-format file on disk, support for apropos and whatis database searches, as well as in-page search with regular expressions, browser-style history (forward and back within any window), user-customizable font styles, and support for links to man pages in several forms (man:groff(1), man://groff/1, and man://1/groff are all supported). The reusable framework core can be embedded in other applications to provide man page handling functionality.
QuHelp is a command-line program that scans a directory with HTML formatted text files and builds a help site using that directory's content and a template. A default template is included, but any template can be specified. QuHelp adds a nice expandable tree view of the help site's contents, a navigator, permalinks, and other useful stuff for browsing the help site.
i-net Doqua is an Eclipse plug-in that helps documentation writers and developers to keep track of inconsistencies between style guides and the actual documentation. The system integrates into the Eclipse IDE and introduces a new perspective and several views. Since i-net Doqua uses standard JUnit testcases to check the documentation, you can trigger checks using Hudson or similar Ant based systems.
BitNami DokuWiki Stack is an easy to use installer for DokuWiki, which is a standards-compliant, simple to use wiki mainly aimed at creating documentation of any kind. It is targeted at developer teams, workgroups, and small companies. It has a simple but powerful syntax that makes sure the data files remain readable outside the wiki and eases the creation of structured texts. All data is stored in plain text files; no database is required.
CryptoCD is a collection of user-friendly documentation for software that provides secure communication through the Internet. The programs cover tasks like email encryption, secure chat, and anonymous Web browsing. CryptoCD comes with comprehensive documentation explaining step by step installation and use of the software for inexperienced users. At the moment, the documentation is only available in German.
Autodia is a command line Perl application that generates UML class diagrams from source code, SQL, and database connections. It supports multiple programming languages including SQL, and can output images (using GraphViz/VCG/SpringGraph), Dia XML and Umbrello XML, or custom formats using templates.