PineGrow 3 which has not been officially launched (site , docs, etc., still to come (September? )) is looking pretty nice with its updated UI/UX from version 2. You can also use PineGrow + Atom together. Hopefully, it's built in code editor will + should still get further features/updates/polishing as v3 matures (hopefully?).
Also here are some videos for Brackets that may help someone along with that app.
I am also really excited for Tandem UI Builder to launch, looks like a great concept / project.