I have so far used JIRA and Trac. I don't like the UI and User Experience. JIRA seems very cluttered. Plus the provide integration of Subversion and other versi

I have so far used JIRA and Trac. I don't like the UI and User Experience. JIRA seems very cluttered. Plus the provide integration of Subversion and other version control systems in it which I myself have never really used. I wanna make something simple and easy to use. Plus, this is a sort of learning project and I would like to experiment newer technologies like HTML5, MongoDB, etc.. in it.