City Simulator is a scalable, three-dimensional model city that enables creation of dynamic spatial data simulating the motion of up to 1 million people. City Simulator is written in Java and is designed to generate realistic data for evaluation of database algorithms for indexing and storing dynamic location data. City Simulator is offered on alphaWorks so that developing systems for indexing spatial data can be tested for scalability and performance against a standardized data set.

WebWatcher is a Java application that will help you keep an eye on interesting Web-pages. You register a list of URLs you want to monitor, and WebWatcher checks for changes whenever you ask it to, or at given intervals. WebWatcher bases it's monitoring on checksums. A page is said to be changed if the checksum generated for the page is different from when the page was last marked as seen by the user.