Quick Brush Selector is a Blender add-on from sum studio that adds a customizable menu for picking brushes quickly. Rather than limiting itself to one area, it works in Sculpt, Texture Paint, and Grease Pencil Draw modes.
The menu can be customized, and documentation is included. The add-on supports Blender versions 3.0 through 5.0 and is released under the GPL license. A demo video is available on the developer's page for a closer look.
Published about three years ago, it has recorded more than 200 sales and holds a five-star rating across six reviews on superhive. For Blender users who move between sculpting, painting, and Grease Pencil work, it keeps brush selection within a single customizable menu, available in each of those modes.