root directory files list

i need a software, which can provide me list of all files inside a website's root directory, even files have a link from any page or not, you need to write custom software for it, or you can give any software from which i can do this work, i will tell you url later, for file list, you don't have FTP account of web, and any other detail related to web, excluding the url. if you can do this then bid now, and also tell me how you do this job.