Not software / technical, but if you'd like to see any available crash test ratings for a car you own or a vehicle you're conisering, check out safercar.gov from the NHTSA (US). It's in the blue column in the middle.

And, if you'd also like to check out the pollution, fuel economy (in MPG), and green house gas score for a vehicle, head over to the EPA's Green Vehicle Guide.

Every so often, I take a look at new car options -- these web sites should help make a better informed decision (if I decided to buy that is!). Anyone know of other sites like this that aren't review sites?