Liquid-Launch aims to make scheduling scripts with Apple OS X's implementation of launchd a little easier. Instead of spending hours agonizing over the writing of an ugly XML file just to get your script to launch every $n day, use Liquid-Launch to write the file for you. That way, you can knock off early and go get that drink you so richly deserve.
Through its web interface, Liquid-Launch runs a teeny bit of Ruby code to parse out your arguments and create the plist file that you can download to your LaunchAgents folder. From there, your machine will automatically perform your script at the desired intervals.
Contributions to the project are more than welcome. There's always something that can be done. Please consider forking the project on Github.
This project is released under an MIT license, which pretty-much means you can do whatever you want with it. See attached LICENSE file for more information.
Make sure you know what you are doing when working with the LaunchAgent files! Liquid-Launch, its creators and contributors are not responsible for how you use this project or code, and any subsequent damage it may cause.