file-tree-alternative VS obsidian-contextual-typography

https://github.com/ozntel/file-tree-alternative to provide a 3 pane style, but not sure what you mean about widgets

Try the File Tree Alternative plugin which can show folders in the top pane. Select a folder and its files appear in the bottom pane.

File Tree Alternative https://github.com/ozntel/file-tree-alternative

The File Tree Alternative plugin supports pinning files to the top of the display of a folder content. You can only see the pinned files if you are looking at that folder in what File Tree Alternative calls "Evernote" mode.

Since that's not possible,(not even in the Windows File Explorer) this Obsidian plugin could help a bit by letting you view folders and files in separate panes (list).

This is pretty simple. Install this: https://github.com/mgmeyers/obsidian-contextual-typography, then in Yaml in any page where you want in image grid or side-by-side, write 'cssClass: img-grid.' Usage is easy. Three images or image links pasted underneath each other no line break creates a three column row of images, two creates two, four creates four. A single line break creates a new row. A double line break takes you out of the grid completely to continue whatever other writing you wanted to do, and you can then freely make another row of images after that.

These two - Visually Numbered Headings - Contextual Typography

Contextual Typography you can change the fonts of headings, simple. link

You can install the Contextual Typography plugin add the Media Grid CSS snippet in your Obsidian vault to display the images side-by-side. Here is a step by step tutorial showing you the process.