JERRY KRINOCK I tried Lingon a few months ago, but found that the mean time between Lingon crashes on Mac OS 10.5 was about ten minutes. Also, Lingon would not "load" the command (using launchcntl, if I recall correctly), so your changes would not take effect until you logged out/in. So, if I needed a scheduling utility I'd give this Cronette a try.
Terrible name choice, though, for something which is not supposed to use cron and I presume uses launchd. Should have called it Launchette.
(Version 1.0.1)