Another one that I always use is steemdollars.com. It shows the exact worth of your vote in cents/dollars. It's nice because then you know when you will finally be able to reward your followers when they reply to you. To be able to give 1 cent you need roughly 200 Powered up steem I believe
RE: A Steemit FAQ especially for NEWBIES - the most helpful pages - start here and get up to speed fast