TPT is a template scripting language implemented in C++. The LibTPT parser transforms TPT templates into text. The parser, which integrates with your C++ code through a simple class API, is small and fast, focusing on functionality instead of rich feature sets. Uses include on-the-fly HTML and source code generation.
FIGlet is a program for making large letters out of ordinary text. It prints its input using large characters made up of ordinary screen characters. FIGlet output is generally reminiscent of the sort of "signatures" many people like to put at the end of email and UseNet messages. It is also reminiscent of the output of some banner programs, although it is oriented normally, not sideways.
rtfx converts RTF files into a generic XML format. It focuses on keeping metadata such as style names rather than every bit of formatting. This makes it handy for converting RTF documents into a custom XML format (using XSL or an additional processing step). It used to be called 'rtfm', but was changed due to a naming conflict.
SMX is a cross-platform dynamic HTML generation language. It is a high level language that is easier to learn than PHP or Perl, but is just as powerful for Web page creation. It was originally designed for developing financial reporting software, and is still uniquely suited for that sort of customer-driven Web development. It features builtin support for ODBC queries, preformatted HTML, linking to Perl or PHP, and much more. It supports Basic authentication and Digest authentication.
RetroWeb is an extension for RetroForth intended to ease the task of creating Web pages. It is still close to HTML, but offers a more compact syntax. Most importantly, it allows you to work with the full power of Forth to generate HTML code. It can be used to create both static HTML files and simple dynamic CGI responses.