: An open, editable library catalog that often provides digital "loans" of book texts. Internet Archive
If you're referring to a tool for downloading or converting audiobooks, I should note that many such applications exist, but their legality depends heavily on whether they:
LibriVox audiobooks are free for anyone to listen to, on their computers, iPods or other mobile device, or to burn onto a CD.
: Once on the book's page, you will usually see several "Download" or "Mirror" links (such as Rapidgator, Nitroflare, or direct servers).