Defraggler is a free, but powerful disk defragmenter made by Piriform for Windows. It has many features above and beyond the defragmenter that comes with Windows: Defrag. It allows you to see every fragmented file on your hard drive and combine them. It also features a quick defrag which just combines fragmented files, and a full defrag which also moves files to the front of the drive. The interface is quite nice as well, and has several features that makes watching the process more interesting.
- piriform.com/defraggler - Official.