Catherine's Basic Procreate Brushes
CC0-1.0, by cOborski
Curated open-licensed brushes
Packs released by their authors under open licenses (CC0, CC-BY, GPL). Unlike the rest of the catalog, these files are hosted here and download directly; attribution and the original source are on every card. Photoshop .abr packs also import into Procreate and Krita, see how to install.
Hyacinth — 19th-Century Mountain Brushes 2.0
CC0-1.0, by K. M. Alexander
Lumbia — Sketchy Cartography Brushes 2.0
CC-BY-4.0, by K. M. Alexander
Mercator Settlement — 16th-Century Settlement Brushes
CC0-1.0, by K. M. Alexander
Moronobu Gansai — 17th-Century Japanese Cartography Brushes
CC0-1.0, by K. M. Alexander
True Tags — A Graffiti Brush Set 1.1
CC0-1.0, by K. M. Alexander
Around Eugene — Photographic Photoshop Brushes
Apache-2.0, by Micky Hulse (mhulse)
Spray Paint Brushes
Apache-2.0, by Micky Hulse (mhulse)