Many purveyors of this type of software do not like the terms 'Spyware' or 'Foistware' or any other name that has a bad connotation. They go to great lengths to claim that they are not. Some have made efforts to minimize the perception of personal intrusion. If any of the programs listed here do not fall under the umbrella of our discussion, PC Voyage will gladly remove their name, providing their T&C statements clearly explain what they do, and that there is no manipulation of personal data or substitution of someone else's code.
You are encouraged to find out for yourselves. If you need further information on any of the listed programs, go to their web site, but take the time to do a Search using the program name plus the word 'spyware'. For example, trickler spyware. You'll be very surprised about what you find!