smartmontools contains utility programs (smartctl, smartd) to control/monitor storage systems using the Self-Monitoring, Analysis and Reporting Technology System (S.M.A.R.T.) built into most modern ATA and SCSI disks. It is derived from smartsuite.
hardware logmonitor that will display log behaviour via various hardware (parallel port, USB devices, ...). You can specify pattern(regexp) in log(s) on which hardware will turn on. It has also some unique ways of visualization of log files.