Run script on boot, as ordinary user

[Nerius Landys]

So there's cron.  Is there anything that lets an ordinary user start
his/her programs at bootup of the system?  And then run a script when
the system is shutting down?  I'm familiar with /etc/rc.d/, but that's
not really what I'm looking for.  I gave my friends access to my
FreeBSD server and I want to let them start for example Apache and/or
MySQL on higher ports running as their own user.