Sometimes it really amazes us that JIRA is being used in company from different sectors. One fine example is New Age Global which is into freight services. They built one software for managing freight solutions for their internal usage but it turned out to be a great tool and they decided to sell it to other freight companies too. These customers often have support request which they send to New Age through email. Now they have decided JIRA to act like their support ticketing system and to visualize the workflow they will use Kanban boards.
Now only support tickets but also for their internal development and big tracking they have decided to use JIRA now instead of Bugzilla.