HTML Screensaver Maker is a tool with which you can make your own screensaver executable file using web technologies, such as HTML, CSS, JavaScript, AJAX . With diffrent uses and usefull kinds such as news feeds, weather information, images slideshow and alot more...
"This is the main window of HTML Screensaver Maker from where you can access all the features of the application."

HTML Screensaver runs like normal web pages, but with some addition to javascript like cross domain XMLHttpRequest and preferences store without using cookies. See the documentation to more infos.