Ah, yes -- instead of being willing to work on improving one of the existing scientific Python front ends and/or libraries (Sage, IPython, SciPy, etc.), let's invent a new one that will end up competing for time and resources with those that already exist.<p>Even though most of these choices are free, they still possess a strong component of not-invented-here (typical of paid software), and the Balkanization of technical Python options and environments.<p>Having said all that, and just to make this interesting, the features page shows some pretty nice stuff:<p><a href="http://code.google.com/p/spyderlib/wiki/Features" rel="nofollow">http://code.google.com/p/spyderlib/wiki/Features</a>