Alarm Clock Pro is a good alternative to filling your calendar with alarms and events. You can easily set alarms for specific times or intervals. These alarms can trigger scripts, sounds, alerts and actions for a variety of purposes.
Check out MacMost Now 461: Alarm Clock Pro at YouTube for closed captioning and more options.
You can check out Alarm Clock Pro at http://www.koingosw.com/products/alarmclockpro.php.
It would be useful if you posted links to applications you discuss (http://www.koingosw.com/products/alarmclockpro.php, in this case). Maybe useful to you, also, in marketing MacMost? Or is it somewhere on the page and I'm just not seeing it?