O&O Defrag Professional Edition is a full-featured defragmentation solution that will help keep your PC in tip-top shape. O&O Defrag Free Edition is also available.

Smart Defrag can defragment files, folders, and entire drives as needed or scheduled. It also features SSD trimming to prolong your SSD performance and life. Here is a direct link to download Smart Defrag for current IObit users. Portable version is also available.

Auslogics Disk Defrag is designed specifically for fast optimization of today's modern hard disks.

WinContig is an easy-to-use stand-alone defragmentation tool that doesn't create any installation directories or registry entries on your computer.

Smart Defrag Portable defragments files, folders, and entire drives; it also features SSD trimming to prolong your SSD performance and life. Installer version is also available.

Glarysoft Disk SpeedUp is a high-speed defragmentation tool designed to analyze, defrag, and optimize disks for peak computer performance.

Puran Defrag is a simple disk defragmenter that will defrag files and optimize your system.

Contig is a single-file defragmenter that attempts to make files contiguous on a disk. It's perfect for quickly optimizing files that are continuously becoming fragmented, or that you want to ensure are in as few fragments as possible.

dfgPortable provides true portability for the hard drive defragmentation app Defraggler.

PerfectDisk's fast and powerful defrag will help speed up everything you do, from web browsing to downloading music and editing pictures.

Defraggler Portable can be used to defrag your entire hard drive, or individual files - unique in the industry. This compact and Windows application will fully support NTFS and FAT32 file systems. Installer version available.

UltraDefrag Portable is a disk defragmenter that supports the defragmentation of locked system files by running during the boot process. Also available for 32-Bit and 64-Bit systems separately.

Auslogics Disk Defrag Pro is the professional edition of Auslogics Disk Defrag. It provides you with a speedy and efficient way to defragment your drives.

UltraDefrag is a free disk defragmenter that supports defragmentation of locked system files by running during the boot process. 64-Bit and Portable also available.

UltraDefrag is a free disk defragmenter that supports defragmentation of locked system files by running during the boot process. 32-Bit and Portable also available.

Use Defraggler to defrag your entire hard drive, or individual files - unique in the industry. This compact and Windows application will fully support NTFS and FAT32 file systems.
Portable version available.

IObit Smart Defrag 6 is a reliable and easy-to-use disk optimizer designed for peak hard drive performance. The latest stable version can be found here.

HDiskDefrag can defragment your hard drive(s) as well as remove temporary files, recreate hiberfile.sys and more.

DiskTuna (formerly DiskTune) is an on-demand, free, hard drive disk defragmentation and optimization software.

Quicksys Disk Defrag is a free disk defragmenter and optimizer for Windows.

A defrag-to-shutdown tool for 2000, XP or better operating systems.

ScanDefrag is a small utility program that configures and runs Microsoft's or Norton's disk utilities as part of the next Window's startup process.

This FREE utility allows you to defragment files in just a couple of mouse clicks in Windows Explorer.

Diskeeper with new IntelliWrite™ fragmentation prevention resolves fragmentation issues by preventing up to 85% of all fragmentation from happening in the first place.

Diskeeper Professional edition performance software elevates system performance and debugs fragmentation related problems as they occur.