Recovering deleted files

idiot sister put a folder of pictures she didn't know she needed into my recycle bin. natrually i emptied the thing. now she wants them back.

what's a good piece of software that'll look at just the 'deleted' files on a drive? i dont wanna go rooting through shit i already have looking for these images.

also, does it make a difference whether or not the pictures were in a folder at the time of deletion?