Download Artweaver, to paint with natural brushes
Artweaver is a free Windows program that simulates natural brush tools.
Its workplace in general resembles PhotoShop. It doesn’t open fast, although not that slow as Photoshop.
Individual palettes can be displayed or hidden. Simple selection of pre-defined brushes. Each brush possesses different settings, which can be changed to own needs. Custom brushes can be added. Individual adjustment of the brushes for specific purposes, and more.