Auslogics Disk Defrag
Why it's best:
Free disk defragmenter that is simple, clean, and easy to use. It doesn’t have all the advanced features that PerfectDisk has, but still does an excellent job defragmenting your drives and speeding up your computer. You can visually see what the program is doing as its running and it tells you the number of files that have been scanned and defragged.
Manufacturer Description: Disk fragmentation leads to system slowdowns, PC crashes, slow startup and shutdown and sometimes to system failures. Auslogics Disk Defrag is designed for fast optimization of today's modern hard disks. Get the maximum performance out of your expensive hardware investments.