pdflayer - Free, powerful HTML to PDF API supporting both URL and raw HTML conversion. Unlimited document size, lightning-fast and compatible PHP, Python, Ruby, etc.
ZAMZAR XLS to XML - ZAMZAR XLS to XML is the web based free conversion system by the ZAMZAR that support for the multiple file conversion.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
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.
Tcpdf - TCPDF: Open Source PHP Class for generating PDF documents
XML Converter Standard Edition - XML Converter Standard Edition is a way to transform the data stored in the XML format to XLS format within few minutes.