I recently found Bodo, which seems okay? Doesn't implement every feature that JIRA offers, just the most common ones. But I'm sure that's to be expected to a certain degree.

+1 I really need this too. I just don't like the web interface and tooooooo slow in New Zealand.

I have used Bee in the past. But haven't been in a Jira based project in a while, so i'm not sure if it is still maintained.