I'm looking for a free GUI app to help run programs on a schedule.  It seems that launchd is the underlying tool to use, and in the past Lingon has been recommended as a good GUI interface to launchd.

But now it seems that the open source (GPL) version of Lingon 1.2.1 doesn't work on Leopard (10.5), and the newest version of Lingon (2.2.1) requires Mac OS X Snow Leopard 10.6.6 or later and is no longer open source.

Has anyone gotten a version of Lingon to run on Leopard (10.5)?

Or is there another free alternative?