What is a working DRM removing download?

What is something I can download to remove DRM from wma files so that I can transfer them to my itunes? I have uploaded a few of my cd's onto my computer, and I cannot transfer them into my itunes because they are "DRM" protected and I can't find the cd's now. Is there a free easily downloadable application you know of that I can download and easily remove the DMR from the wma files? Thank you so much.