Redmine

Usecase:
I have lots of trackers, each one having multiple custom fields.
To be able to quickly distinguish them, one could use a naming scheme such as "tracker_fieldname".
But: The content of the field "name" that also serves as the label shown next to said custom field in the assigned tracker.

Solution
It would be good to have separate fields for "name" and "label", with "name" being what is shown to the administrating custom fields, and "label" being the text shown next to the field in the trackers.
Adding a separate "label" field that would only be shown if it's non-empty would permit backward compatibility.