Brush Quickset is a free Blender add-on to ease control of the brush size and strength using right mouse-button gestures. It works in Sculpt Mode, Vertex Paint mode and possibly more brush-based modes.
The add-on was created by @jynell and updated for more recent Blender versions by @Amandeep.
To use a different mouse-button or key, assign it to brush.modal_quickset in Blender’s Preferences ➔ Keymap.
@Metin_Seven the addon works correctly for Vertex paint and perhaps also for weight/ texture paint, so I think the “for Blender sculpt mode” should be changed in the topic title. The old addon topic had these modes in the name too.
Actually, the addon doens’t work for Grease Pencil at all, there were other entries for brush size that were mapped to the same key, which I mistakenly identified as part of Brush Quickset. I would really like to see this fixed