Logic Driver Pro – Blueprint Editor (New Update)

Create custom node types that run actions and build your own gameplay systems: dialogue trees and narrative flows, quests, achievements, combos, AI behavior, UI navigation, and more in a visual graph-based, parallel finite state machine blueprint editor.

Technical Details
Pro Features:
Create your own node in blueprints or C++.
Expose variables on nodes, complete with drag & drop support.
Combine custom states and execute multiple actions.
Text parsing allows variables to be dropped directly on to text.
Parallel states increase the possibilities and reduce the total number of required states.
Core Features:

New blueprint editor designed to simplify state machine creation.
Hierarchical state machines are supported directly or by reference.
Evaluate transitions conditionally or from events.
Manage as UObjects or ActorComponents for increased flexibility.
Supports run-time visual debugging with the blueprint editor to make testing easy.
C++ source code included.

https://www.unrealengine.com/marketplace/en-US/product/logic-driver-state-machine-blueprint-editor