Is there an analogue of the Article editor from Look At Me?

Question

JavaScript

Hello!
Please advise if there is an editor equivalent to " Article ".
Which is used on projects like Hopes and Fears, FurFur, etc.
In general, you need an editor on the topic, where you can add blocks (columns) on a modular grid, add text, photos, videos, and so on.
It is clear that the case did not find anything of the kind, and I ask the community to suggest, direct, whether it is worth looking for or whether you need to think about your solution.
Now I'm picking Sir Trevor if I can add an opportunity there, add blocks (columns). In general, the issue is resolved.
Thank you.

Answer 1

There is bootstrap , I think what you need.

Answer 2

Keler, did you manage to add columns to Sir Trevor?