webgen
Webgen is a tool to automatically generate a menu/tab system for web-pages. It reads the definition of the menu from a file and build the final html files by composing the header, menu, content and footer of the page which can all be specified. An example of the result can be seen at this page, which was generated by webgen.
Webgen was written in C++ and is distributed under the GPL. You also need some css-files for correctly working pages, since webgen uses some predefined styles. The corresponding files are included in the archive.