Based on the great Lingon 3 and extends it with new features like running jobs as root and at multiple dates.
Things Folders creates and manages a folder structure based on your Things projects and areas.
Prevent strange things from happening to save humanity.
Although the website is still available, it appears that the downloads provided by the developers are not working at all which makes it impossible for me to test it. However, if you still have the application available, add some items and then drag one entry over another category on the left tree. If by no means is not working, then the software doesn't support the drag and drop feature.