TestFreaks posted a review on Diskeeper 2009 Professional
Today we will look at Diskeeper 2009 Professional which is designed to work silently in the PC background to keep fragmentation at bay. Similar to the 2008 version, Diskeeper 2009 uses InvisiTasking Technology and Frag Shield 2.0 to help maintain hard drive performance. It works silently in the background and requires very little user interaction.Diskeeper 2009 Professional Reviewed