All Material blending

Blender Development Fund
Asset Library
Blender Development Fund
Asset Library
Geoblend - Easy Object Blending
$3

Megani in Addons

Easy Smart Blend
$7$4.90 Dev Fund Contributor

Blender Procedural in Addons

Permablend
$19.99$13.99

Egret Studios LLC in Addons

Anti Tile 2
$9,999

kartikay A Mathur in Models

Pbr Mixer
$28

Nodes and noodles in Surfacing