How to keep track

I am not sure if I am posting in the right section

I want to know how can I know or any one how many people are on my site
is there any plugin to keep the track of visiters?
When I click it, it take me to a site where I can see all the info about how many people are on and every hour how many people has visited
I have seen in a site but don't remmber the name of the site
hope you know what I mean

 

I am not tracker but I know that send virus t the particular email client and then this virus get activated and starts to transfer information.

 

google analytics

 

Well for exactlly what you need you can go here: http://whos.amung.us

It really can tell you also where the visitors are from, and they have also a pro version, that I am planning also to buy. They have also some widgets, very cool stuff

 

Thanks east that's the one I was looking for it

 

A statement will be sent each year at around the time of your child's birthday, showing how much has been paid into Child Trust Fund account, and it's current value. This will help you keep track of any payments made, and check on the account's progress.

 

I thought Awstats able check it as well.......