JIT Scheduler 

JIT Scheduler is a simple and handy task scheduler that allows you to program and automate simple tasks like execute programs, system shutdowns, open documents or send messages or reminders. These tasks can be launched at a given date and time specified by the user. The user interface is really intuitive and simple, and it has been designed for beginners who only intend to automate simple tasks. The program is fully customizable and you will be able to modify the user scheduler, system scheduler, the appearance, system settings and task profiles. To create a new task, you simply should follow the instructions of the wizard, completing all the fields and selecting the options that best suit your needs. It's perfect for scheduling boring but common routines like disk checking and defragmentation, virus scanning, etc.

All in all, JIT Scheduler can be very useful if you only want to automate simple tasks, but if you want to schedule complex tasks you should definitely look elsewhere. And the best thing is that it is completely free.

It supports Windows 95/98/Me/NT/2000/XP/2003 Server.