No it have a trial period just like noptXP its fast and small and works for free for 30 days
Hey i never heard about a screensaver that defragments a HD
Diskeeper has an option, set it and forget it.
set that option to screensaver and u never have to worry bout defragging, just keep ur screensaver on when u leave the comptuer and then itll defrag while its on screensaver.