As u can see on the bottom most list of this page “You are our visitor No:XXXXXXX”.
This is my upcoming project. Here you can register for free. And in just placing ONE line of code u can be able to get all the reports on your visitors:
4. Time Of Visit
6. Operating System
7. User’s Online
And Many More.. Now this is in ALPHA stage. To support it u can place one on your website.
(Click HERE). http://counter.webchilly.in