PassMark DiskCheckup is described as 'Allows the user to monitor the SMART attributes of a particular hard disk drive. SMART (Self-Monitoring Analysis and Reporting Technology) is a feature on a computer's hard disk for providing various monitoring indicators of disk reliability' and is a hard disk diagnostic tool in the os & utilities category. There are more than 10 alternatives to PassMark DiskCheckup for a variety of platforms, including Windows, Linux, PortableApps.com, MS-DOS and BSD apps. The best PassMark DiskCheckup alternative is CrystalDiskInfo, which is both free and Open Source. Other great apps like PassMark DiskCheckup are GSmartControl, HD Tune, Hard Disk Sentinel and HDDScan.