My crontab looks something like this;

1 * * * * /var/www/cron/site1.sh > /dev/null 2>&1

0 * * * * /var/www/cron/site2.sh > /dev/null 2>&1

3 * * * * /var/www/cron/site3.sh > /dev/null 2>&1

This works great and lets me place all the nasty little script calls into one place, rather than making crontab harder to read than it already is.

But, this fails massively when site2.sh needs one script to run once a day, another to run once a week and another to run every 5 minutes. And of course it gets worse as new scripts get added with different timings.

Is there a better way?

EDIT

By better I mean making it more manageable, having a large crontab is not manageable, but neither is having scripts all over the place.

Not a GUI necessarily.