Program/site to check site stats

Hi, I was searching for few days on the net and shoot I can't find nowhere any good program (also I checked here and didn't find it).
So however I only found few programs to check on what sites, the site which I'm looking for is published (backlinks).
The thing is that I would like to know if there is possible somehow to get software or get site name which'll show you if you type in some search field site url and it'll find you all the traffic where searching site is getting it and how much (daily or month)?
Is there any kind of ^^ software or just seo programs for checking backlinks?

Thanks

thats a gold information

if the website has a high alexa rank, you can check at alexa.com for some information.
Some websites have those free trackers icons in the footer where you can check the information as well.
quantcast.com is another option to spy some website information

regards

Yes I know bunch of sites similar to alexa. The thing is that only displays general info about site, like actual site stats, site visitors, where some backlinks are published and their number...etc.
However I'm looking for simillar software like spyglass just if it's possible would be really great to see where exactly is sites getting traffic and how much. It would be great to know such software cos yea you can easy get it to with "spying" on site.?