Puran Defrag - Automatically Defrag your Hard Disk Drives.
After reading the capabilities, if you want to down load the program, make sure you select the "Download This Utility" button and not the "Download Puran Utilities".
It's been almost a year since I've installed this on my computer, at that time there wasn't any unwanted bundled software added in during the installation. But things can change, so if a customized installation is offered, select that option and be on the look out for anything other than the defrag program trying to install.
If you prefer, you don't have to set up any schedule, you can just defrag from the UI when you like. Same thing for the boot time defrag.