Mine is not actually a website but more of an extensions via google chrome browser, it gives me direct percentage of users who vote on a post and the amount each vote is worth, also shows me followers or following direct steempower and their respective 100% vote value, price of steem in usd anytime and many more but you have to install more than one extension to fully utilize all, with it I can get the info directly except more in-depth information in which case I use steemworld.org