Source: http://feeds.gawker.com/~r/lifehacker/full/~3/tcF7t3RuaMw/d+filemu-renames-your-files-on-the-go
If the enormous command-center-style dashboard interface of previously reviewed Bulk Rename Utility is overwhelming and way more than you need, D-FileMU provides a simple—and soothingly blue—alternative to all that extra chrome. All the basic file renaming tools are present in D-FileMU, but laid out in a step by step way that allows you to selectively activate them. After choosing the actions you want to perform—completely replacing the name, appending it, removing select characters, etc.—you can choose the files to act on one-by-one, or by file extension. In a basic test where one thousand image files were completely renamed, D-FileMU performed the task in a matter of seconds, keeping it on par with other, bulkier renaming tools I use. D-FileMU is freeware, Windows only.