Excellent soft for managing your film scan library. All info can be written: equipment, frame number, development techniques. No comparable tool on the web.
Nice software, the interface could be more usable, but after you get used to it, it does its job quite well. Tested on Mac OS X. Since it is using exiftool, I feel safe using it. Suggestions for people shooting with manual lenses on digital cameras: First thing to do is clicking on "Edit equipment" and look at default presets. Then create a new camera clicking on "Add camera body". If you don't want to overwrite your camera data (most of us won't), remove every property field clicking on the red icon top left. Then you should create a new entry for every manual lens you're planning to use: click on "Add new lens", click on the green icon on the top left an add the "Focal Lenght" field from the "Frame" sub menu. Last thing to do is to fill the fields for your lens. When you want to add lens data to your shots, select them from the left pane and double click on the lens entry from the equipment pane on the right (You can select more than one shot using shift and ctrl or Cmd, like in any file manager). No changes will be written until you click on the "Save" button. Remember to review current aperture in the metadata (it's under "photo" group), and edit it as needed to reflect current shot settings.