Hey guys, I'm looking for some free software that will organize files depending on their file extensions (other options such as size, last modified etc would be helpful too, but just file extension is what I'm after).

I've done a bit of Googling, but I always fine that they just want to catalog your files into their program, which you have to open up. I don't want this. I need the files physically moved on the hard drive.

Oh did I mention that I want it to run with command lines, or at least run in the background, and I can start it automatically.

I'm thinking of making something like this if there's none around... but I'm sure there's a free one out there... somewhere.