All the usable stuff

[Tunco]

Either make lot of topics, or just hang them over one topic.
This topic is for that, post usuable stuff you've seen on web.
I will start.
___
http://www.wolframalpha.com
Yes, Wolfram Alpha.
Wolfram Alpha is not a search engine, unlike Google, seems pretty similar.
Wolfram Alpha is a web based knowledge finding platform and calculating platform.
Unlike Google, it doesn't gives you tons of sites that might have the thing you are searching for.

Well, WA is not like that.
For example, write;
"How old is the oldest person?"
And see the result yourself; it gives the exact thing you are searching for.
And you can even have something that even not on web but already on Wolfram Alpha.
Take this example. It shows pi to 1000 digits, and you can even display results as graphs!
NewYork Weather.
You can see how it graphs the results and list it.
You can do calculations also.
Take that equation, and see how it shows the results.
In short, Wolfram Alpha is smart google.

__
YouCube
Who said you can't watch multiple videos from Youtube at once?
Well, go to YouTube, insert 6 video links from youtube, and then see how it works!
You can rotate the cube whereever you want, and watch all the videos at one!

__

So I'm talking about this. Post some usuable things here, like I listed above.