Sublime Text. Hmm, just took a look and was quite surprised to realize that this is quite a nice editor. With various others recently, I thought, okay, nicely done, but not really usable features. But the 10000-feed overview for the currently active source, for example, is surprisingly easy to use - you can actually recognize the structure of your own source and quickly find positions in the source again. And the idea of commands via the command palette is also really useful. And Python plugins sound good too, even if I haven't looked at the API and performance in more detail yet. (Yes, yes, I know, I just talked about how much I like PyCharm and now another editor... it's just the eternal search for perfection!)