A favicon (short for "favorites icon" and also known as a page icon), is an icon associated with a particular website or webpage that is displayed in the browser address bar next to a site's URL.
Quarkbase is a free tool to find complete information about a website. It is a mashup of over 30 data sources and many algorithms gathering information from Internet on various topics like social popularity, traffic, associated people, etc. e.g. http://www.quarkbase.com/show/microbiologybytes.com