Defraggler is a free, but powerful disk defragmenter made by Piriform for Windows. It has many features above and beyond Microsoft's Disk Defragmenter that comes with Windows. The features of Defraggler include:
- Full drive analysis and defragmentation.
- List of fragmented files, and the ability to defrag files individually.
- Options for moving large files or specific file types to the end of the drive.
- Quick defragment with custom rules.
- Custom file exclusion filter.
- General drive health and errors.
- Customizable interface that displays the defragmentation progress.