Not in maemo. Maemo has alarmd which is better than at or cron for one simple reason: it is hardware supported. It works when your phone is switched off. And it has powerful recurrence support.[...]We didn't manage to find any application, which uses it, but now you can see how it is implemented in ET-Prolog.
By the way. I couldn't find how to obtain shepherd and see how it is implemented. Am I right, that this topic and wiki page is everything available?