The Powered Access Bible is a CGI script designed to facilitate finding verses and reading them in context, minimizing the usual mousework. It divides the screen into a search frame and a reading frame, and clicking on a search reference will load its context in the reading frame. All executable code is available under the user's choice of the Artistic, GPL, or MIT license, and the translations used are all free for non-commercial use.
pyratemp is probably (one of) the smallest complete template-engines for Python (with about 500 LOC). It has a very small set of special syntax in the templates. This reduces complexity and the probability of bugs and lead to an easy-to-use and intuitive user-interface. It uses embedded Python-expressions (in a "sandbox"), is well documented, has full Unicode-support, and produces very good error-messages, which is very useful when creating new templates.
XIST is an extensible HTML and XML generator. It is also an XML parser with a very simple and Python-esque tree API. Every XML element type corresponds to a Python class, and these Python classes provide a conversion method to transform the XML tree (e.g. into HTML). XIST can be considered 'object-oriented XSLT'. XIST also includes a cross-platform templating language, Oracle utilities, and various other tools.