Im not saying these are the best splatter brushes, so you dont have to get any of these if you dont wish to, these are just some good splatter brushes I have and use:

KA Splatter Brushes
Spazz Splatter Brushes
dieheArt grunge Splatter
Ylenia Splatter Brushes
=Becklagen Splatter
LeeDeeya Splatter brushes
env1ro Splatter Natural Pack 2
VexingArt Blood Splatter Brushes
ro-stock Large Splatter Brushes
mpo Splatter Brushes

And some vector brushes I have and use:

PAULW Abstract - Vector Brushes 1
PAULW Abstract - Vector Brushes 2
PAULW CONSUMERtec Brushes
1deadpixel - Vector Brush Pack
SeedFX Vector Abstract Brushes Vol.1
IHEA Vector Curves
Spekta- Vector Brushset
VPDesigns Vector Brushes
its-justGRACE First Vector Brushes
ghostss Vector Brushes
Vector-VPDesigns Brush Set 1 by ~psbrushes


And thats all the brushes I have, I think.