Script to send daily emails (something like course material)

I am looking to make a course material to which a user can subscribe and he will get daily emails (say for 30 days) with course material.

The course material will constitute the body of the email.

Any Free script for this ?

Thanks

 

you can setup a cron job.

 

ya but I also want a front end to it. I can ofcourse make something on my own but if there is already pre written script for this, than than can save lot's of time