I have quite the opposite opinion. I really like working with Jira (as opposed to e.g. bugzilla, clearquest). And I really prefer Jira agile plugin to Trello,

I have quite the opposite opinion. I really like working with Jira (as opposed to e.g. bugzilla, clearquest). And I really prefer Jira agile plugin to Trello, some PO tried to force Trello on us (developers) but we had to resist for some time, until they stopped pushing it. Trello looks like a sticky notes app and nothing more to me. Not to mention it is not "on-premises" so if a given company cares about security it won't use it. Bitbucket Server (formerly Stash) is also quite nice, but I don't have comparison to GitLab or Github Enterprise, so I don't know what I'm missing.