Virtual Crontab is a FREE PHP script that will allow you to schedule tasks on your site when you do not have access to Crontab. You can set a schedule to execute any program, or load any URL with this program. Need to execute a program every minute, 10 minutes, every day? This is the script for you.
This script installs in seconds and does NOT require a database as all tasks are saved to a file. You can execute programs on your server and have the results emailed to you. You can also have your site contact any other site via a URL on any schedule you wish.
Download here.