BHO, Browser Helper ObjectDictionary

Also called BHO. A BHO is a small program that extends Microsoft's Internet Explorer. Examples of BHO usage include visible add-on toolbars in IE, but can also be hidden functions. Ad- and spyware as well as browser hijackers often use BHOs to display ads or follow your moves across the internet, because a BHO has access to each URL you visit and can redirect you or display other pages than you requested (ads, for example).
BHOs often use ActiveX installation programs.

BHOTools

Spybot-S&D is able to display a list of installed browser helper applications. It also has a small database integrated that will display a green checkmark in front of browser helpers known as legit, and a red sign in front if applications known as illegit. It also allows the user to enable or disable single BHOs.

This list can be exported into a text file as a reference and for further analysis.