ChenilleKit Project
· A collection of sophisticated Ajax-enabled components based on the prototype/script.aculo.us JavaScript library
and many more ...
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window chenillekit-project-1.3.3.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.