The 'Alexa toolbar' is a website gathering information service that continually crawls the web to provide real-time statistics to its members. The service is unique and gives an insight to any website's popularity including monthly traffic trends. The lower the rank, the more popular the site. It downloads in 30 seconds and has an 'auto set-up'.

To download it visit: http://www.alexa.com/site/download?p=TrafficDet_W_b_40_T1