Update: my latest brush pack FLORA has been released! You can find them at my Gumroad site: https://gumroad.com/l/GStWM
Want to see examples? Check them out here:
Note: New Wet Media Brushes added on 4/6/16! You can download for free on Gumroad here: https://gum.co/yrXpN
I've created my first set of custom brushes for Procreate: MattyB's brush pack H_hatch effects! You can download them for free on Gumroad: https://gumroad.com/l/gCDU
I hope you find them useful.