JIRA runs not only on Windows, OSX and Linux but also on FreeBSD. There are some unofficial installation steps which don't differ that much from the official Linux installation documentation.
This post describes how to make JIRA start automatically after a restart. But after starting it I realized that I can not only edit but also add pages to the Atlassian documentation (and so can you). So I did and the result is Starting JIRA Standalone automatically on FreeBSD.