A pack of organic alpha brushes I made a while back! 1st image is what's already included, 2nd is what's coming tomorrow. It's gonna be a free upgrade for the people who
Get 21 free hard-surface alphas for ZBrush and Substance | CG Channel
sculpting - How to get a extrude with alpha brush - Blender Stack Exchange
Get 370+ free custom ZBrush brushes from XMD Source | CG Channel
Make Any Image a Brush Alpha | Blender 2.8 - YouTube
How to Use Alphas/Textures for Sculpt Brushes - YouTube