I don't know what is Crimson Editor, but Qt has a tool to edit. I can only say that it's unlike Borland (and M$ too) products, it's another world
If u don't like Qt Editor you can type in Emacs, vi, KWrite... they are all made up to write codes, they all highlight reserved words (at least make a view of it
E.g. I like to write htmls for my useless homepage in KWrite.
And forget Windows. Read LQ -> forums -> general -> Slackware propaganda.