Really, this is more like [NeoVim](https://github.com/neovim/neovim), in the way it's structured and with its aim to rebuild its namesake in a modular fashion with swappable UIs.
I use vim as editor for system files, but I only use the 1% of its capabilities I really need. All these shortcuts make me sick because I can't remember them and can't easily find them. That's also why I don't like Atom, sublime, Visual and all that kind of editors. I'll give a try to this Lime editor.
The best IDE around, in my humble opinion, is QtCreator because the interface is remarkably simple and intuitive. I regret no one tries to copycat this one.
I gave QtCreator a try just a couple of weeks ago actually. I wanted to give qml a go and expected this to be where it shined. But the create project dialog wouldn't fit on the screen and the create button wouldn't enable for some reason (possible something off screen).
This really reminds of using KDE3.x & QT in general a decade ago or so :)
Video demo: http://youtu.be/FTInd3H7Zec