calibre is a free and open source e-book library management application.
Dawn will convert your address book from one program's format to another.
Tool to convert an addressbook from ldif to vcard
flv converter - transcodiert (!) nach mp4 oder avi
Convert LRF (Sony BeBB) files to EPUB, PDF, RTF, and HTML. Also converts PDF and DOCX to EPUB.
Eine große Auswahl an online Umrechnungstools. Alles dabei was das Physikerherz begehrt