BeeSeek is a project to build a free, open-source search engine based on a peer to peer technology. Code and bug reports are available on https://launchpad.net/beeseek-project
CitySpeed is a Python package that uses online mapping services to gather statistics on the efficiency and complexity of road networks. This can be used to create maps showing how fast you can drive around a particular city.
jWebApp is a Java MVC web application development framework that is annotation and configuration free, and can literally be learned in a matter of minutes. jWebApp is specifically designed to satisfy the need for extremely simple web development.