A free software service that helps users become pros atsurfing the Web. The service helps users determine therelative value of web sites they visit through a variety of stats and facts about each site and then recommends links of where they might want to go next. These links are determined by a unique search technology that learns from all users web surfing history. Alexa also solves the problem of 404-not found/server unavailable by providing an archived copy of any publicly available website. And, Alexa allows users to communicate with friends and colleagues online in real time through its instant messaging service.