MacSOS has updated their "cron" Mac task scheduler, MacAT, to version 5.3. MacAT allows users to schedule system tasks like launching applications, backing up files, and running AppleScripts. According to MacSOS:
MacAT is a "cron" task scheduling application for Macintosh server administrators. It is a PowerPC application that allows 37 of the most common MacOS tasks to be run daily, weekly, fortnightly, monthly or yearly without user intervention.
These scheduled tasks include: Launching Applications, Files and AppleScripts; Quitting individual applications or alternatively quitting all currently running processes; Rename and Delete any File or Folder; Hide and Show applications, Mount remote AppleShare volumes; Copy Files or Folders to mounted AppleShare volumes; Unmount nominated AppleShare volumes; Restart or shutdown the Macintosh, eject Zip disks and send eMail.
MacAT is available as shareware for US$39. You can find more information at the MacSOS web site.