Interesting Free Websites

What (free) websites do you visit that you find interesting as hell that most people probably don't know about?

Here are a couple of my favorites:

http://radio.garden/live/ Tons of streaming radio stations from all over the world.

http://hint.fm/wind/ What is the wind doing now? Click to zoom/drag. Fun to look at while HAF.

Feel free to post your favorites!

www.stumbleupon.com Just some great random stuff.....
Just keep hitting that orange Stumble button.

Hey @Stu, that windmap looks like my hair first thing in the morning.

http://himawari8.nict.go.jp

Real time view of the himawari 8, a Japanese weather satellite, stunning views of our earth

Kind of the extention of the wind website