From LiteMobile Software:
WAP Proof is a Windows-based emulator of a WAP browser. By using the WAP emulator, you can view mobile-oriented (WML, XHTML, cHTML and HTML) pages exactly as if they were opened on a real mobile phone and switch between different mobile devices by few mouse clicks. The HTTP request entity of the WAP emulator is similar to that of a real mobile browser, so you can develop the resource which is sensitive to a user-agent. If your mobile website is not ready yet, you can use WAP Proof to validate the XML syntax of your WML or XHTML document, debug the interactive WAP pages, and trace the raw HTTP traffic between the browser and the server. The error diagnostics is clear and all the debugging information is accessible. To learn more about the features of the software, read the "Features" section.