UltraDefrag is a free open-source hard disk defragmentation application for Windows. Read more >>
Here you can download UltraDefrag for free. All files are original, taken from official sources and checked for malicious inclusions.
Check out the links and choose the right one. If the latest version of the program does not suit you, try one of the previous ones. If it is not here, write in the comments (indicating the required version) and we will try to find and place it.