Keepy Notes by Abhimanyu Sirothia

Keepy Notes changes how Google Keep looks on keep.google.com. Instead of a grid of cards with a pop-up editor, you get a three-column layout:

Left: Keep's own label sidebar, kept open.
Middle: your notes as a scrolling list, each showing a title and a couple of lines of preview. Pinned notes always show their pin.
Right: the open note, with its controls along the top. "No Note Selected" shows when nothing is open.
Also included:

"Take a note" becomes a toolbar above the list, and the expanded box pushes the list down.
Up and Down arrow keys move through your notes.
Works in Keep's light and dark themes.
One click on the toolbar button turns the layout off and brings back stock Keep, grid view included.
If Google changes Keep's page so the layout can't be applied safely, Keepy Notes switches itself off and tells you, instead of leaving a broken page.
Privacy: Keepy Notes only runs on keep.google.com. It does not read, store or send your notes, makes no network requests and collects no data. The only thing it saves is whether it is switched on or off.

This is an unofficial add-on. It is not made by, endorsed by or affiliated with Google. Google Keep is a trademark of Google LLC.