how to know the sites pr

You can use SearchStatus plugin if you are using firefox

 

just used seo quake then you will knw the pagerank of everysite...

 

I've been using google toolbar and its really helpful I can see the pr of websites instantly.

 

you can use this tools to measure your sites pr and positions and more
.iwebtool.com

 

Some tools for u :

google toolbar
seobook toolbar
backlinkwatch.com

 

Agreed! Google Toolbar is the best option.

 

There are many free online page rank checker tools available on net. check using those tools.

 

Google tool bar is the best option to check your PR of your website instead of choosing some tool.

 

Install Google Toolbar or can use Checkpagerank