Music Organizer is an ultralight freeware which allow you to manage your musical files easily.
It can sort, edit their Tags and their names. Avaiable since more than one year, it's also multi-plateform(Windows, Linux, Mac OS X) and is always beeing develloped.
Don't take care of its apparent simplicity. The product is a modest software. It simply began as an university project and grown over the years.
It is efficient and only does usefull stuff : it will not make some tea but everything needed to be done.