Cron
Cron is meant to be run on the auth server, however it will happily run on a standalone workstation.
Create the user cron file
auth/cron -c
This will create the directory /cron/<username> and add an empty cron file. See cron(1) fro details of the cron file format. Just remember to use local as the machine name.
Start cron at boot
Add auth/cron to /bin/rc/termrc.local:
# start cron auth/cron
/plan9/