This page https://confluence.atlassian.com/adminjiraserver071/supported-platforms-802592168.html is the one with the most information and, typically, the supported platforms page for each project is where I go when I need to know what I can/can't run on.
I have run several Atlassian products on Windows in the past (now migrated back to Linux) and they ran just fine. I had Confluence, JIRA, Fisheye, and Crowd on Windows Server 2012R2 with no problems at all. Basically, as they note in the link above, these are Java applications so the underlying OS is, for the most part, not at issue.
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