Defraggler is a very small, but extremely powerful hard drive defragmentation tool. Unlike similar tools of its kind, Defraggler comes with more features: you can not only defragment the entire hard disk, but also individual folders and files; the program provides information on the locations of the saved files and makes a detailed analysis of the hard disk.
Defraggler supports both FAT32 and NTFS partitions, and is authored by the company which created the very well know CCleaner and Recuva. Defraggler is a freeware and works under Microsoft Windows 98/ME/2000/XP/2003/XP/Vista and new Windows 7.