The drawing tools available in this free version of ArtRage are the following: paintbrush, marker, crayon, pencil, and palette knife.
Select the intensity of each tool to obtain finer or heavier lines. You clean the paintbrush in the same way you would in real life - submerge it in a glass of water to eliminate leftover paint.
If you have a touchscreen tablet, you can use your fingers to draw. ArtRage is capable of recognizing the pressure that you exert in order to determine the thickness of your line.
Tons of additional features await you in ArtRage's commercial version, including a layer system and PSD support.