Quick Link
https://extensions.blender.org/add-ons/easy-driver/
Pricing
free
CGDive Review
Easy Driver Tutorial by CGDive
Easy Driver Overview
The "Easy Driver" is a free Blender extension that simplifies the process of setting up drivers.
Easy Driver is available on the Blender Extensions Platform which means that it can be installed simply by searching under Edit > Preferences > Extensions (Blender 4.2 and later).
Main Features and Use Cases
- Automating Corrective Shape Keys: the add-on can set up a driven shape key, e.g. to improve the deformation of elbow when the lower arm rotates towards the upper arm.
- Simplifying Shape Key based Face rig setups: just like Corrective Shape Keys, the addon can streamline the setup of any other type of Shape Key such as Facial Morphs.
- Bone Drivers: The add-on allows you to set up multiple driven bones simultaneously.
- Custom Paths: Easy Driver can also create drivers for “custom paths”. A custom path is any Blender property, even if it is not covered by the Shape key and Bone automation features. For example you can drive: Material Properties, Object Visibility, Transform Channels, etc.
The add-on also optionally automatically creates Limit Constraints. This is a great feature which locks all axes except the one needed for the driver.