They even have modules to detect tracking cookies which just goes to show how specific they've gotten these days with all of these modules. The same is true of many third party firewalls which now often include specific modules to detect these specific classes of threats such as worms, Trojans and keyloggers and the likes. These days most of these types of specialized behavioral functionalities are in fact included in most well rounded antivirus and internet security applications, though some of these more specific modules are sometimes disabled in the free versions of AVs if the vendor offers a free version.

They were specialized products and utilities designed to focus on a specific sub-class of malware or other potentially undesirable and/or risky software and typically either used a very small and specific def set rather than a large all-encompassing database (like the AVs do) or they would use some possibly novel behavioral method of detecting whatever type of application they are designed to protect from. It's similar to the anti-Trojan, anti-spyware and anti-adware applications which used to be quite common at one time or another. My own AV has such functionality built into it so were I to run a separate application designed specifically as an anti-keylogger it probably would be excessive, especially if the one built into my AV used behavioral mechanisms to determine when an application was hooking into the system components which would be used by a keylogger for that very purpose (which it does) rather than relying on a set of definitions to determine if a piece of software is or contains a known keylogger (though of course most AV/AM apps do this as well along with their other malware definitions). While I cannot speak for anyone else here, I suspect that what sman was referring to above was the 'Safe Browsing' functionality built into many AV/IS products which is sort of a blanket term often used by many security software vendors to refer to certain components designed to protect a user's security and privacy when browsing the web, including privacy protection from software which might attempt to intercept and log the user's keystrokes (i.e.

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