OpenSource graph node editor

Let me share my project.
It's a node editor which you can use in your own project (even commercial)

NodeInspector​

This is how you can create your node types

Code (csharp):

1.  
2. using UnityEngine;
3. using NodeInspector;
4.  
5. [NodeMenuItem("MyConfigNode")] //This directive create option menu in the inspector
6. [OneWay]       // If you won't provide this attribute you won't be abble to link to this instance as inputnode
7. public class MyConfigNode : ScriptableObjectNode {
8.    [OneWay]  //next property will have output link to another node
9.    public MyConfigNode LinkToNode;
10.    public int          TestInt;
11.    public LayerMask    TestLayerMask;
12.    [OneWay]
13.    public MyConfigNode LinkToAdditionalNode;
14. }
15.  

And this is top level node holder

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections.Generic;
4. using NodeInspector;
5.  
6. [CreateAssetMenu] //This is standard unity feature. Create instance of this object in assets
7. public class MyConfigHolder : ScriptableObject {
8.    [Graph("StartNode")] //this is a name of the property of this class
9.    public List<MyConfigNode> Nodes;
10.  
11.    public MyConfigNode StartNode; //if you don't need a start node you don't need to use Graph parameter
12. }
13.  

That's it.

Read quick start guide
And you can even find simple dialogue editor inside

Hope someone will like it =)