I don't understand how they stay afloat without serving a shitton and a half of ads, but there is way more free data out there now then I remember there being, and most of them are pretty damn ethical, so (most of) them are not ones to spy on your through their service for the NSA. Open Street Map is like Wikipedia meets Google Maps with morales. I love it. You probably know a whole lot more about your home town than Google Maps does, so you can edit it to be way more accurate than Google Maps and anyone can access it for free. Open Farm is very new but it's basically the same thing but for growing food. Anyone can write guides for a certain plant, for their own climate or how to grow it in a different way. Open Weather Map is just free weather data, you only have to pay for it if you're pulling down a fuckton of requests. And then of course there is the old, beautiful, Wikipedia. I'm sure there are some sites I'm missing, but these ones I've notice and I really appreciate them. I would donate a lot of money to them if I were not so poor.
 And also I forgot the Sunlight foundation. which provides easably accessible data on whatever the government says they're doing. I suppose Wikileaks will pick up rest of the slack.