Alternatives to O&O Defrag

Disk SpeedUp

It suits Windows users who want to analyze and schedule defragmentation of drives or selected files and folders.

Autoruns

Autoruns suits Windows users who want to inspect and manage configured startup entries, including entries for other accounts.

DymaxIO suits Windows PC, server and virtual-environment operators, especially those running I/O-intensive applications.

Defragger may suit Linux users who need to inspect filesystem allocation and work with supported ext4 or FAT volumes.

DiskTuna

It is aimed at beginners and professionals, including photographers and data recovery engineers, working with damaged JPEG or supported RAW images on Windows.

e4defrag suits Linux users working with extent-based files on ext4 who want to check or address fragmentation.

It suits users maintaining DOS-compatible drives in FreeDOS.

It suits users who need to arrange supported `.bin` ROM or firmware images on removable media and can meet the platform’s permission and free-space requirements.

Puran Defrag suits Windows users who want scheduled or boot-time defragmentation, along with controls for specific files and folders.

WinContig suits Windows users who want to defragment particular files or folders rather than whole disks.

xfs_fsr suits Linux administrators managing mounted XFS filesystems who need file-level extent reorganization.

It suits Windows users managing either listed drive type who want scheduled, automatic, or boot-time drive optimization.