mod_npy is alternative way of running Python scripts under Apache - alternative to having mod_python installed, or running as CGI. It allows mixing Python code with HTML much like PHP. It's a mixture of Python power and PHP style page writing.
CAjax is a library for building AJAX style web applications, which consists of a javascript package for easy writing object-oriented AJAX logic in javascript, and a set of server-side packages dealing with unified communication details.