Lately I’ve been testing if it’d be possible to make a new Textpattern theme. It is. I had great plans for it. It ended being like this. This is 100% free theme and should work quite nicely with Textpattern’s version 4.5.5. Might work well even with earlier subversions, and future versions as well. This article has more screenshots. The theme, simply named "kuopassa", can be downloaded from kuopassa.net/txp or directly here.
Admin theme for Textpattern 4.5.5