| Original author(s) | Dmitri Arkhangelski, Stefan Pendl, Justin Dearing, Sayem Chaklader |
|---|---|
| Stable release | 5.0.0 / December 31, 2011 |
| Preview release | 5.5.0 RC2 / December 31, 2011 |
| Written in | C, JavaScript, Lua |
| Operating system | Windows NT 4.0 Windows 2000 Windows 2003 Windows XP Windows Vista Windows XP x64 Edition Windows 7 |
| Type | Defragmentation program |
| License | GNU General Public License |
| Website | http://ultradefrag.sourceforge.net/ |
UltraDefrag is an open-source disk defragmenting utility for Microsoft Windows. It is released under the GNU General Public License. The only other Windows-based defragmentation utility with a GNU GPL is JkDefrag (GPL version discontinued since 2008).
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UltraDefrag was originally written by Dmitri Arkhangelski in 2007, who was later joined by Justin Dearing who wrote an original user manual and UltraDefrag Scheduler application. Later Sayem Chaklader joined the team to completely redesign the project's website. Also he improved graphics belonging to the project. In the year 2009 Stefan Pendl joined the team. Most new features and improvements since that time were invented by him.
UltraDefrag uses Microsoft's defragmentation API and works on Windows NT, 2000, XP, Server 2003, Vista, and 7 operating systems. It supports FAT12/FAT16/FAT32 and NTFS file systems and, on Windows Vista and later, the Universal Disk Format (UDF).