Chakotay is a macro preprocessor which can probably be best described as a mixture of cpp, M4, Perl and Scheme.
Dina lets you put any commands and languages into otherwise normal HTML files.
filepp is a generic file preprocessor designed to allow the functionality provided by the C preprocessor to be used with any file type.
The Guava Tools is a set of Perl scripts that add C-like preprocessing to HTML.
HTML Preprocessor Lacking An Interesting Name
htmlex is a small but powerful HTML preprocessor, which has numerous advantages compared to conventional HTML files.
HTMLProc is a HTML preprocessor, designed to aid the web creator. It's main advantage is allow to include files into files. This allows you to put a menu in a file and include it into all your pages, so if you change something in the menu, it will change automagically in all files.
htmlPX is a simple command-line program that can be used to build websites from template files. The template files and other, auxilliary files, are combined by htmlPX to produce HTML files that can be uploaded to a website.
htmlshell is an offline HTML preprocessor. It copies the output of embedded shell commands to an HTML file.
Htp was intended as a HTML pre-processor. It is able to preprocess HTML, XHTML, XML and CSS files (htp could process any text based files). Its purpose is to assist you to maintain a consistent "look" over an entire set of web pages. This is done by allowing you to define your own tags as abbreviations for sets of standard HTML tags.
issPolicy is a free open-source utility for converting an ISS RealSecure Network Sensor and ISS Proventia Inline Appliance Policy to a static HTML file.
Written in Perl, issPolicy allows for granular parsing of ISS RSNS and ISS Proventia policies , and supports a wide
variety of features allowing the HTML generation to be customized based on different policy parameters.
kses is an HTML/XHTML filter written in PHP. It removes all unwanted HTML elements and attributes, and it also does several checks on attribute values. kses can be used to avoid Cross-Site Scripting (XSS), Buffer Overflows and Denial of Service attacks.
phptags is a simple commandline tool to automate the rewriting of PHP open and close tags.
phpx augments PHP syntax with powerful metaprogramming constructs such as mixins, class-level eval()/macros, pattern matching, annotations and interface delegation.
Prebuild is a cross-platform XML-driven pre-build tool which allows developers to easily generate project or make files for major IDE's and .NET development tools including: Visual Studio .NET 2002, 2003, 2005, SharpDevelop, MonoDevelop and NAnt.
Speakhtml is an HTML preprocessor written in scheme.
YAML For Ruby
YAML For Ruby is a YAML processor for the Ruby language, coded in pure Ruby. Its implementation is simple and small, designed to be used in place of PStore.
Youpee's One Unlimited Html PreProcessor Program: an html preprocessor that allows to embed any code of any script language as well as calling any external program to generate text files