INTRIGUE is an example of a non-educational adaptive system. It is in fact only adaptable: it bases the adaptation on parameters that you set when you register.
Intrigue lets you plan a vacation to Torino (where the research was performed), taking into account the available time, your interests, the interests of another group, for instance children, physical disabilities such as difficulty to move or eyesight problems, and geographic interest.
Different presentation formats are available, for instance a separate list of recommendations for you and for the other group, a combined list with explanations as to why the site is recommended for you or the other group, and presentations for handheld devices as well.
Intrigue can sometimes be tried on-line to get a feel for what it does. This again is not a well-supported system, so it is only on-line when the creators want to use it for research purposes.