Editing metadata for multiple files - is there a free program for this?

Two senior employees are leaving my company and leaving me a nice big pile of files on their laptops for me to sort out.

I want to chuck all this stuff at Sharepoint, but before I do that I want to edit the metadata for these files.

Obviously, going through one at a time isn't going to work - I want to process them all at once. If I was renaming the files, this wouldn't be a problem - Norton Commander or RenameIt are both perfectly adequate for my needs.

Is there something similar out there which is able to change the metadata for multiple files?