Trac ... it's not specifically for agile. But it's bloody easy to install and just does basic ticketing. It also comes with a wiki, svn integration and a few other things. See https://bitnami.com/stack/trac/installer for a mega-easy way of using it. It's web browser based, but on a server of your choice.
A few years ago I used http://www.redmine.org/ for one project. It had better git integration compared to Trac back then.
Later I used http://bugseverywhere.org/ because I prefered it's non centralized nature (it will be included in your git repository).
Nowadays I simply use two text files. openIssues.rst and closedIssues.rst. Works great and matches your personal needs perfectly ;).
(For example, I always include a time estimate to each open issue and add the measured time, once it is done. Helped improving my estimates quite a lot.)