- - Native Cocoa interface
- Drag & drop inventory editing with item images
- Item list searchable by name or item number
- Experimental "time of day" editing
- Requires Mac OS X 10.6
You can check out a screenshot and download the app or its source code on GitHub: http://preble.github.com/InsideJob/ Click the "Downloads" button toward the upper right for the binary app download link. The readme contains basic instructions.
Although I believe that Inside Job does a good job of not destroying your saved world data, please backup your saved worlds before running it as it has not been tested on more than a few systems. (Inside Job does make a copy of your level.dat file before overwriting it each time you save.)
Hope you find it useful!
EDIT: Updated URLs.