Of course it's ad supported, but that's a small price to pay for your very own private website. Businesses large and small are free to use it, as well as associations and organizations. I think it's a little more than that. It speeds up your Internet connection by 'pre-fetching' web pages, blocks unwanted advertisements and cookies, adusts your Windows clock to the official time of the Atomic Clock, and even shows you information about your Internet connection you'd normally never see. It's even got a handly little Sitemapper tool that allows you to see links within a webpage and navigate it before it's even displayed in the browser.
Some websites are only good for one thing, but here's a handy reference site.
Remember to visit the World Time web site the next time you need this information. You'll find an interactive atlas, sunrise and sunset information, a database of public holidays, and the current time worldwide. There are lots of health related website on the Internet. You know, alternative medicines, cures, remedies, and the like. Now mind you, it's not witch doctor stuff, but rather more traditional things.