Locktastic is a simple plug-in for Lightroom 2 or 3 that marks read-only files with the red label.

It’s quite common for photographers to “lock” certain pictures in the camera, making it that little bit harder to delete a good shot.

Some event snappers do this much more systematically, “chimping” during the event and tagging pictures they particularly want to work on when they get back to their desks.

This plug-in is designed to detect those images once they’re in Lightroom.