Painter

Cher Threinen-Pendarvis
Digital artist and author. Includes articles, brushes, textures, and art galleries.
http://www.pendarvis-studios.com/

deviantART: Painter Resources
Offers brushes, documentation, swatches, and other application resources.
http://browse.deviantart.com/resources/applications/painter/?order=9&alltime=yes

Imagine 3D
Pattern, paper and nozzle downloads, tutorials, and art by Alan Suel.
http://www.alansuel.com/c/more.htm

Marc Whittmore
Painter Nozzles of a few creepy crawlers.
http://www.newdream.net/~jusdo8/zozzles/nozzles.html

Painter Creativity
Handbook author provides articles, tutorials and downloads, as well as a master forum and gallery.
http://www.paintercreativity.com/

Tlbtlb.com: Downloads
Downloads for watercolor brushes.
http://tlbtlb.com/links/index.html