“Orb” (Michal Vicente) – Creator of the “Orb Cracks” brush (which I personally prefer over DMStandard).

Vincent Meier – Contains some free hair brushes and some commercial human models.

Dan Rozanski – Contains both free and commercial cloths, seams, rocks, stones, bones and hardsurface brushes and alphas.

Terrainbrushes – commercial terrain brushes created using opentopo.sdsc.edu.

My Gumroad – For now just contains a few small items (all for free) which I plan to expand with time. Want your Gumroad added to this list for free? Contact me.