Fantastic!

Drag & drop functionality, move between folders, 10 folders in the free version is enough for *most* hobbyist/home biz site builders. Nice compromise of free vs paid/pro features.

I’ve no idea why WordPress doesn’t come with this functionality built in, but this plugin is mandatory if you have even a few images or media files on your site. I have it installed on all the sites I manage and it does a wonderful job of keeping things organized.