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.
Meskalin is a *nix parallel port control program
it allows you to easily control LED's or wetwire devices like brainwave machines
ported for: FreeBSD, netBSD, openBSD and Linux