Many years ago - when I was a Windows user - I had an application which made renaming files an amazingly simple experience. You would select the files you wish to work with, and their filenames would appear within what was essentially a huge textarea. Imagine a text editor (such as TextEdit, Sublime Text, etc.) open to a document that simply lists all filenames, with each filename on a new line.
With the files in this interface, you had your "standard" find/replace tools (CMD+F), as well as the ability to use REGEX. You could use the keyboard's arrows to move around the filenames without extra clicks or bulky interfaces. Modified filenames were highlighted with a different background and applying changes to all files was a simple CMD+S.
Does something like this exist for OSX?
// edit - to clarify: I'm aware of OSX's built-in bulk file renaming options in Finder, and software along the likes of NameChanger, Renamer, Automator, ABetterFinderRename, etc. I'm specifically looking for software with the kind of UI I described.
// edit 2 - the original Windows software is called Oscar's Renamer: http://www.mediachance.com/free/renamer.htm