This article highlights the corntab iPhone app, which I wrote with Corona. The interface is pretty basic but I made some cool drop down menus. You can check out the app to see what I mean - it's free.
This is actually the 2nd time ServerWatch has written about corntab (a visual crontab editor for Linux admins). The first article was just about my website http://www.corntab.com.
The article is located here:
http://www.serverwatch.com/tutorials/article.php/3914876/Easy-Crontab-Editing-with-Corntab.htm
It's also one of the featured articles on their homepage right now!