Posted Request is a utility class that handles requests like multipart/form-data that support file uploads. It is a wrapper over the standard HttpServletRequest, and, while partly emulating its interface, it completes HttpServletRequest with possibility to receive file that has been sent to server, as byte array. This byte array can be saved then, either in the database, or as a file.
Universal Admin gives you full site administration capabilities right from the browser. Once authenticated, you get a shell prompt right inside the browser. Additionally, you get a file upload option. It works as a substitute for telnet and ftp. You may find it useful under the following situations: Your ISP does not provide you a telnet; You need to manage your site frequently from behind a firewall or proxy, where running a telnet or a ftp is not possible.