UltraDefrag

UltraDefrag is a powerful open source defragmentation tool for the Windows platform. It allows you to defragment all system files including registry and paging files. The main goal of this program is speed and reliability of execution!

Feature list:

• defragmentation of system files
• ultra fast NTFS analysis
• defragmentation of individual files and folders
• fast disk optimization
• secure file processing
• configurability of degragmentation
• command line support
• supported system files: FAT12/16/32, NTFS, UDF (on Vista and later systems)
• shutdown pc when work is done
• simple operation, multilingual playout

Download UltraDefrag for 64-bit Windows here.