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.
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.
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.
mod_auth_openid is an authentication module for the Apache 2 Web server. It handles the functions of an OpenID consumer as specified in the OpenID 2.0 specification. Once installed, a simple configuration directive can secure a directory or application on your Web server and require a valid OpenID/XRI identity. You can configure trusted/untrusted identity providers along with a number of other options.