Did research in psychology lead to any useful technology? Research in physics allowed us to build bridges, computers, put people in space. Research in chemistry led to the discovery of all sorts of new materials which we use everyday. Research in biology led to many the discovery of many drugs that save millions of people every day. [Fill in more examples of game-changing technology based on hard sciences here.]

Did research in psychology lead to any useful technology? If yes, what are your favorite examples?
Artificial intelligence has received a strong influence from cognitive science, not only in its name.

Concepts like the P300 might have an application in lie detection. See this.

Cognitive psychology is in the basis of assessments for drivers, pilots. For that you'll need to work through concepts like attention, concentration, and the like. 

That said, it's not in the scope of psychology to produce technology. So, you won't find much more than concepts/views/ideas flowing into/inspiring a technology.