Program: Auslogics Disk Defrag
License: Free for personal use
Description: Disk fragmentation leads to system slowdowns, PC crashes, slow startups and shutdowns. Auslogics Disk Defrag is designed for fast defragmentation of modern hard disks. The new version can also consolidate free space and optimize system files placement. Disk Defrag is absolutely FREE for home users.
Note: Auslogics already have a portable version on their site however not sure of it portability by PA.com standards.