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I think these features are really what sold me.. project managers might like having a visual interface to work with (webapp) but I would much rather just be in my terminals

I love the idea of Open Source applications being distributed this way. Here's our application.... and everything required to run it in a virtual machine.

It's more common than you think; RT and Trac both have cli interfaces.

You can do a lot of things in RT via email also, e.g. close a ticket, assign to someone else, move it to another queue, etc. with special tokens in the email body.