I noticed that (on Windows) Atom installation file is 145MB vs 4.4MB of Notepad++ !!!
If I have to use an external text-editor with Cabbage, I prefer a little and fast one, so I think on Windows I will stick to Notepad++ (that does all I want: syntax highlighting, not-too-invasive code-completion, function list, code-folding, multi-document, multi-view, is fully customizable and... I already said this, but it's very fast!!).
I just found that there is a "Notepad++"-inspired text-editor on Linux too: it's called Notepadqq... I have to try it!