This is a paid asset, but now you can download uNode – Visual Scripting Free.
Detail this asset from Unity Asset Store: Original Link
uNode – Visual Scripting v2.3
uNode – Visual Scripting v1.8.7
uNode – Visual Scripting v1.8.6
uNode – Visual Scripting v1.8.5
uNode – Visual Scripting v1.5.4
uNode is Visual Scripting plugin for Unity 3D. This plugin allows designers, artists and programmers to create gameplay mechanics, interactive systems and even C# script without writing a single line of code.
•NEW Node Browser
•NEW Graph Explorer
•NEW Vertical Graph
Use the new Vertical graphs theme to ensure best experience using uNode with blocks, notes, minimap, proxy, and a beautiful state machines (Unity 2019.1+).
•NEW Macros Features
Create a graph once and reuse them in entire graphs with different parameters.
Powerful flow graphs for low-level logic and complex tasks.
Powerful state graphs which combine Flow, State Machine, and Behavior Tree into one graphs.
Use automatically generated nodes for all and any Unity functionality, your code and 3rd party APIs. Including Methods, Properties, Fields, Unity Events, C# Events, Generic Methods, Constructors and Operators.
Each build in nodes are supported to generating a script and its fully no dependencies with uNode this mean you can remove uNode and run output script to another project without uNode.
•C# Parser (Required Unity 2018)
Import c# script into uNode to quickly creating a node graphs and learn how uNode work.
Elegant state machines for high-level logic and easy state management, support nested state machine and unity events in each of state.
•Basic Support for Behavior Tree
Included Behavior Tree nodes to help creating AI easily, fully support to combine it with State Machine and Flows nodes.
•Actions & Conditions System
Make game with more easier ways, better organized, and easier to understand for non programmers.
Get instant access to Unity and custom documentation directly from the Editor.
Modify any part of your graphs while in playmode to quickly prototype and test ideas (Only supported in uNodeRuntime)
Insert breakpoints, watch connection, and watch variable changed in runtime and generated script.
Undo/Redo changed nodes, variable, etc fully support in editor.
Import from exist uNode (runtime, class, struct) or Global Variable and Export to prefab, exist uNode to save more times.
•And much more
C# Generator Feature
•Class: Support modifier, namespace, attributes, interface, and inherit from another class.
•Struct: Support modifier, namespace, attributes, and interface.
•Variable: Support modifier, and attributes.
•Property: Support modifier, and attributes.
•Method: Support modifier, attributes, parameter, and generic parameter for Generic Method.
•Constructor: Support modifier, and parameter.
•NestedType: A type defined within a class or struct (unlimited of nested).
Supported C# Object
Supported Type: UnityEngine.Object and its subclasses, and type that supported by FullSerializer will be supported which mean almost all type are supported.
•Development Platforms: Generated script support all platforms that Unity support. While the uNode runtime fully support Windows, Mac OS X and Linux, other platforms are not tested.
•Works on Unity Pro and Free