CloudConvert - convert anything to anything - more than 200 different audio, video, document, ebook, archive, image, spreadsheet and presentation formats supported.
XLS to XML - XLS to XML is the name of a portable and cross-platform application for converting the XML file to the XLS and vice versa.
Smallpdf - PDF document management and conversion suite
Easy XML Converter - Easy XML Converter is a the name of a free and simple XML converter that make its users able to get the XML file converted in multiple formats in addition to Excel.
Clipperly - Convert, edit or optimize your files online. More than 400 different formats supported among documents, images, spreadsheets, ebooks, archives, presentations, audios and videos.
RoxyApps Spreadsheet Conversion Tool - Converts csv, et, numbers, xls, xlsx, ods and other spreadsheet files to png, pdf, html, jpg, and other formats