CodeTurtle 0.1 is available for download :)
This first release has almost all of the base functionality I want in place before the start of the semester in mid-January. The two biggest pieces that are missing are automatic compilation of student submissions and printing support. I'm hoping to get both in and a new release out before the semester begins.
Outside of those two features, I'm pretty happy with what got done in such a short amount of time. I hadn't expected to add the comments section, but as I thought about how I normally grade projects I realized how important it was. The UI is also more flushed out than I expected it to be so early.
More details can be found in the included documentation (displayed when the application is started or from the Help menu).
Soon I hope to flush out a roadmap of sorts with the ideas I have planned, it's just a matter of dedicating the time to actually write them all down.