NetMechanic will run a test to check your website for errors and it's
free. Simply type in the url, and it sends you an email. The email
contains a url that shows the results of the test on your website.
Sun is a true leader in the world of the Internet. They not only make a
lot of the systems that are used as web servers, but are also the
creators of JAVA. Don't forget to check out their main WEB page.