AJAX Tree Control is a modified version of SilverStripe's tree control. It adds dynamic loading of child nodes via AJAX. The default implementation uses the prototype library to make dynamic requests, but this behavior can be overridden by setting functions on the global Tree object. There are a few demo Ruby on Rails applications included in the distribution that show how to use and customize the tree.
PennAve is a dynamic photo gallery application designed for users of F-Spot. It directly utilizes the F-Spot database to provide a fully dynamic Web interface that allows users to drill down through tags and view your photos. Scaling of images is done automatically, so all you need to do is just copy your photos and database to your Web server. Internally, the user interface is highly customizable as it uses XML and XSLT to display the HTML, allowing individuals to completely theme the application without making any changes to the program itself.
Q3utX Master Browser is an efficient Urban Terror game servers browser. It interrogates a "Master Browser" and retrieves all servers notified, then shows all info about game servers through an Ajax loader. It shows the server game name and type, IP address and port, server engine, current map name, number of users, and current players. It can filter based on game type.