Most of them are already popular softwares (like hostingcontroller accountlabplus etc.). And I think litecommerce is not a billing software. Also look at http://www.cwispy.com/cwISPy/ if you don't know it. it's free.
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LayeredPanel (www.layeredpanel.com) is not a billing system. A billing system is normally seperate from a management panel.
However if you're after free hosting or paid but where you have total control over everything your members do, then LayeredPanel is by far the worlds #1 choice.
Who am I to say this? Well after having to deleted 30K accounts because of my previous system, then having to delete another 3000 becuase of cPanel, and having tried other panels too... you're hearing this from a guy who's used them all.