Software that can be used as an alternative to UltraDefrag:
  • 1952 votes
    Same quality and features as paid defragmenter, no cost forever.
    • Freeware
    • Windows (all)
  • 47 votes
    Defrag Your Drive - Avoid Fatal System Failures and Speed Up Your Computer
    • Freeware
    • Windows XP/Vista/7
  • 31 votes
    Fast and thorough disk defragmentation, optimization and free space consolidation - All controlled from the Command Center
    • Shareware
    • Windows (all)
  • 5 / 5
    2 votes
    Very simple disk defragmenter which will defrag the files and optimize your system.
    • Freeware
    • Windows (all)
  • 11 votes
    Piriform, the company that brought you CCleaner and Recuva, now brings you a file defragmentation tool.
    • Freeware
    • Windows (all)
  • 4.7 / 5
    7 votes
    SpeeDefrag is the exclusive freeware program, which optimizes Windows defrag. It restarts your computer, which refreshes the RAM and loads just the defrag.exe program.
    • Adware
    • Windows (all)