Driver detective?

Hi.

does anyone know about any good programs to use to detect ur drivers, and update them if its needed?

I have driver detective and driver genius.. but both is some kind of payshit, so i have to pay alot of money if i want to use them

so if anyone know of any decent programs like those, but a program that is free of cost, or maybe even got a working link for a download / torrent that has one of these programs or similiar programs included a crack, would really make me happy!

thanx !