milton
· With Milton WebDAV Server Library for Java you can create your own WebDAV server, add WebDAV support to your existing Java project or DAV-enable your CMS/DMS/CRM.
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 milton-4.0.1.1802.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.