Use Case Tool
· Provides XSD to support writing effective use cases in XML in the way described by Alistair Cockburn.
Generates a neat HTML documentation from the XML use cases.
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 uctool-3.0.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.