JKDefrag is a very simple easy to use portable defragmenter tool that can be used to defragment your local hard disks, floppy disks and even portable USB flash drives or external hard drives. JKDefrag can basically defragment anything that looks like a hard drive to Windows.
JKDefrag - Portable Defragmentor Utility Screenshot:
Authors Website: mydegrag.net
License: Open Source
Download: Grab it HERE