Top sites is a program which works like a poll system. It lets a webmaster sign up and receive a special URL which he/she will put on their website. Then, whoever clicks on that link/banner linked to that special URL will generate one vote for that site. The more votes the site gets, the higher it is ranked among other sites. (example)
1. Unix or Windows NT
The current price for this program is $150. If you are interested, please email email@example.com for order information.