Microsoft provides a “Works 2000 Converter” for installation along with it’s Office suite but that doesn’t help people who don’t have Office installed.
However the libwps tools have been ported to Windows and you can get the Windows binaries by downloading and unzipping the latest libwps-tools-0.x.x.zip file from Sourceforge. http://sourceforge.net/projects/libwps/
To convert, launch a command prompt (cmd.exe) and then cd to where you unzipped the tools and run:
wps2html.exe TheWPSDoc.wps > TheWPSDoc.html