Piriform - (Free)
Defraggler helps to a better management of disk space on the computer.
Defraggler is a handy utility for the management of disk space on the computer.
With a clear and user-friendly interface, this utility software is primarily used to defragment the hard drive. The software can be configured according to user needs , being possible to schedule defragmentation at users convenience. This way, the operation does not consume too many system resources . At the appropriate time, defrag runs automatically.
The peculiarity of this program lies in the fact that defragments files and directories that needed without starting the process for the entire drive if it is not necessary.