I am looking for a tool that would tell me how popular a particular site is and how much traffic it is getting for specific keywords. Are there any tools like that? I need this for JV partner search.
You can't spy on their exact traffic and keywords unless you have access to they site stats. But you can see estimated traffic on a site by using alexa ranking.
Go through stat counter and check there in Recent keyword Activity. All those keywords which has searched in Google for your website will show over there.
there is a tool called seodigger.com, however the results dont seem up to date. i am looking for something like that