Tools classifying network traffic to applications

Hi, As I know there is tools designed to analyze VoIP traffic, but for viewpoint of traffic management this is not enough. Is there tool which could classify network traffic to its applications? e.g. the tools catch network traffic and recognize its application type automatically. If 80% of (80/tcp) is web browsing (tcp/80) is recognized as WEB browsing; if 80% of (1234/tcp) is Edonky, it is recognized as Edonkey application. Joe Send instant messages to your online friends http://asia.messenger.yahoo.com