This set of 72 matched pairs of pictures (each pair has one arousing and one neutral picture; 48 pairs are neutral-negative and 24 are neutral-positive) is available in three separate zip files for research purposes.

Mather, M., & Nesmith, K. (2008). Arousal-enhanced location memory for pictures. JML, 58, 449-464. PDF

Mather, Gorlick, & Lighthall (2009) driving game

This 5-minute driving game provides a measure of risky decision making, as participants get points the more they drive during yellow lights, but risk losing all the points if the light turns red while they are driving.

Driving game in Mac and PC versions.

Mather, M., Gorlick, M. A., & Lighthall, N. R. (2009). To brake or accelerate when the light turns yellow? Stress reduces older adults' risk taking in a driving game. Psychological Science, 20, 174-176. PDF