Defrag programs

http://www.zamzar.com/
http://www.glarysoft.com/disk-speedup/
http://www.auslogics.com/en/software/disk-defrag/
http://www.mydefrag.com/
http://www.wieldraaijer.nl/
http://www.softpedia.com/get/System/Hard-Disk-Utils/Puran-Defrag.shtml
http://www.iobit.com/iobitsmartdefrag.php