The oldest one I regularly use is this one: https://web.archive.org/web/19961108115333/http://www.kela.fi/

It's the Finnish state organ for giving people their welfare benefits and operating the national health insurance system. So, if you get a child, you get an amount of money per month from Kela for having a child. (Because they want the population to grow).
Or, if you end up unemployed for a longer time, it's Kela that will pay your unemployment benefits.
Of if you break your leg, it's Kela that pays for your hospital care. I don't know how many forms I've already filled on their website :D

But yeah, the site's been around for a while now.