web-modules-iframe-navigator
· Web modules provide pluggable functionality to web applications.
Typically a web module consists of a server and a client library.
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 web-modules-iframe-navigator-0.2.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.