back-up library

hey guys, now that I've burnt all my hard drive to DVD can anyone sugest some software that keeps tabs on where everything is.
I worked at an advertising agency and I remember typing key words into a program that would tell me what disc to find it on.

Or is there some kind of system thing that does the same thing nowdays?

I am not sure how good it is for your private DVDs but for Music, Movies and Books, Delicious Library is pretty good. Devonthink and cdpedia are some other alternatives.