diff --git a/Scripts/Editor/NodeEditorGUILayout.cs b/Scripts/Editor/NodeEditorGUILayout.cs
index d173abf..cb7136c 100644
--- a/Scripts/Editor/NodeEditorGUILayout.cs
+++ b/Scripts/Editor/NodeEditorGUILayout.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Reflection;
+using System.Collections.Generic;
 using UnityEditor;
 using UnityEngine;
 
@@ -136,5 +137,29 @@ namespace XNodeEditor {
             GUI.DrawTexture(rect, NodeEditorResources.dot);
             GUI.color = col;
         }
+
+        /// <summary> Make a popup with all variable ids.</summary>
+        public static string VariablePopup(XNode.NodeGraph graph, string variableId, params GUILayoutOption[] options)
+        {
+            if (graph == null) return variableId;
+
+            List<string> variablesStrings = new List<string>();
+
+            foreach (var item in graph.variables)
+                variablesStrings.Add(item.id);
+              
+            int originalIdx = variablesStrings.IndexOf(variableId);
+            int newIdx = EditorGUILayout.Popup(originalIdx, variablesStrings.ToArray(), options);
+
+            if (originalIdx == -1 && newIdx == -1)
+            {
+                EditorGUILayout.HelpBox("Looks like the variable that used to be here, doesn't exist anymore. \n id:" + variableId, MessageType.Error);
+                return variableId;
+            }
+            
+            if (newIdx >= variablesStrings.Count)
+                return variableId;
+            return variablesStrings[newIdx];
+        }
     }
 }
\ No newline at end of file
diff --git a/Scripts/Editor/NodeEditorUtilities.cs b/Scripts/Editor/NodeEditorUtilities.cs
index d0cbc7b..67d18d0 100644
--- a/Scripts/Editor/NodeEditorUtilities.cs
+++ b/Scripts/Editor/NodeEditorUtilities.cs
@@ -48,8 +48,8 @@ namespace XNodeEditor {
                 );
             return methods.Count() > 0;
         }
-
-        /// <summary> Return a prettiefied type name. </summary>
+        
+        /// <summary> Return a prettified type name. </summary>
         public static string PrettyName(this Type type) {
             if (type == null) return "null";
             if (type == typeof(System.Object)) return "object";
diff --git a/Scripts/Editor/NodeGraphInspector.cs b/Scripts/Editor/NodeGraphInspector.cs
new file mode 100644
index 0000000..32a5b24
--- /dev/null
+++ b/Scripts/Editor/NodeGraphInspector.cs
@@ -0,0 +1,160 @@
+using System;
+using System.Reflection;
+using System.Linq;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEditor;
+
+using XNode;
+
+namespace XNodeEditor
+{
+	[CustomEditor(typeof(XNode.NodeGraph), true)]
+	public class NodeGraphInspector : Editor
+	{
+		SerializedProperty variablesProp;
+
+		List<Type> _knownTypes = new List<Type>();
+		void OnEnable()
+		{
+			variablesProp = serializedObject.FindProperty("variables");
+			NodeGraph graph = target as NodeGraph;
+			
+			foreach (var node in graph.nodes)
+			{
+				foreach (var port in node.Ports)
+				{
+					if (!_knownTypes.Contains(port.ValueType))
+						_knownTypes.Add(port.ValueType);
+				}
+			}
+		}
+
+		public override void OnInspectorGUI()
+		{
+			serializedObject.Update();
+
+			DrawVariables();
+
+			serializedObject.ApplyModifiedProperties();
+		}
+
+		void DrawVariables()
+		{
+			EditorGUILayout.LabelField("Variables");
+			EditorGUILayout.Space();
+			for (int i = 0; i < variablesProp.arraySize; i++)
+				DrawVariable(i);
+			DrawVariablesActions();
+		}
+
+		void DrawVariable(int index)
+		{
+			var variableProp = variablesProp.GetArrayElementAtIndex(index);
+			
+			var idProp = variableProp.FindPropertyRelative("id");
+			var typeProp = variableProp.FindPropertyRelative("typeString");
+
+
+			DrawVariableId(idProp);
+			DrawVariableType(typeProp);
+			DrawVariableValue(variableProp, typeProp.stringValue);
+			DrawVariableActions(index);
+
+			EditorGUILayout.Space();		
+		}
+
+		void DrawVariableId(SerializedProperty idProp)
+		{
+			EditorGUILayout.PropertyField(idProp);
+		}
+
+		void DrawVariableType(SerializedProperty typeProp)
+		{
+			List<string> options = new List<string>();
+			options.Add(typeProp.stringValue);
+			int idx = 0;
+
+			List<string> additionalTypes = new List<string>();
+			additionalTypes.Add(typeof(float).AssemblyQualifiedName);
+			additionalTypes.Add(typeof(int).AssemblyQualifiedName);
+			additionalTypes.Add(typeof(bool).AssemblyQualifiedName);
+			additionalTypes.Add(typeof(string).AssemblyQualifiedName);
+			additionalTypes.Add(typeof(Vector3).AssemblyQualifiedName);
+			
+			foreach (var type in _knownTypes)
+			{
+				if (additionalTypes.Contains(type.AssemblyQualifiedName))
+					continue;
+				additionalTypes.Add(type.AssemblyQualifiedName);
+			}
+
+			foreach (var addType in additionalTypes)
+			{
+				if (!options.Contains(addType))
+					options.Add(addType);
+			}
+
+			List<string> prettyOptions = new List<string>();
+
+			foreach (var option in options)
+			{
+				prettyOptions.Add(System.Type.GetType(option, false).PrettyName());
+			}
+
+
+			idx = EditorGUILayout.Popup(idx, prettyOptions.ToArray());
+
+			typeProp.stringValue = options[idx];
+		}
+
+		void DrawVariableValue(SerializedProperty variableProp, string type)
+		{
+			if (type != "")
+			{
+				type = System.Type.GetType(type, false).PrettyName();
+				type = NodeGraph.GetSafeType(type);
+				
+				var valprop = variableProp.FindPropertyRelative(type + "Value");
+				
+				if (valprop == null && type != "object")
+				{
+					type = "object";
+					valprop = variableProp.FindPropertyRelative(type + "Value");
+				}
+
+				if (valprop != null)
+					EditorGUILayout.PropertyField(valprop);
+				else
+					EditorGUILayout.LabelField("Value");
+			}
+			else
+				EditorGUILayout.LabelField("Value");
+		}
+
+		void DrawVariableActions(int index)
+		{
+			if (GUILayout.Button("Remove variable", GUILayout.Width(120)))
+			{
+				variablesProp.DeleteArrayElementAtIndex(index);
+			}
+		}
+
+		void DrawVariablesActions()
+		{
+			GUILayout.BeginHorizontal();
+
+			GUILayout.FlexibleSpace();
+			if (GUILayout.Button("Add new variable", GUILayout.Width(120)))
+			{
+				variablesProp.InsertArrayElementAtIndex(variablesProp.arraySize);
+				var newVarProp = variablesProp.GetArrayElementAtIndex(variablesProp.arraySize -1);
+				newVarProp.FindPropertyRelative("id").stringValue = (target as NodeGraph).GetSafeId("new_variable");
+				newVarProp.FindPropertyRelative("typeString").stringValue = typeof(float).AssemblyQualifiedName;
+			}
+
+			GUILayout.EndHorizontal();
+		}
+	}
+}
diff --git a/Scripts/Editor/NodeGraphInspector.cs.meta b/Scripts/Editor/NodeGraphInspector.cs.meta
new file mode 100644
index 0000000..58f2bd6
--- /dev/null
+++ b/Scripts/Editor/NodeGraphInspector.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 16edf05454c66b04ba4ebd0bf5b0af6c
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Scripts/Editor/NodeInspector.cs b/Scripts/Editor/NodeInspector.cs
new file mode 100644
index 0000000..49602aa
--- /dev/null
+++ b/Scripts/Editor/NodeInspector.cs
@@ -0,0 +1,16 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEditor;
+
+using XNode;
+
+namespace XNodeEditor
+{
+	[CustomEditor(typeof(Node), true)]
+	public class NodeInspector : Editor
+	{
+		public override void OnInspectorGUI() { /*hides unneeded info*/ }
+	}
+}
+
diff --git a/Scripts/Editor/NodeInspector.cs.meta b/Scripts/Editor/NodeInspector.cs.meta
new file mode 100644
index 0000000..0faa43e
--- /dev/null
+++ b/Scripts/Editor/NodeInspector.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: a079842175cdba54a8c36ad52f983502
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Scripts/Node.cs b/Scripts/Node.cs
index ddc43ea..3f6c51a 100644
--- a/Scripts/Node.cs
+++ b/Scripts/Node.cs
@@ -62,7 +62,6 @@ namespace XNode {
 
         protected void OnEnable() {
             UpdateStaticPorts();
-            Init();
         }
 
         /// <summary> Update static ports to reflect class fields. This happens automatically on enable. </summary>
@@ -71,7 +70,7 @@ namespace XNode {
         }
 
         /// <summary> Initialize node. Called on creation. </summary>
-        protected virtual void Init() { name = GetType().Name; }
+        public virtual void Init() { name = GetType().Name; }
 
         /// <summary> Checks all connections for invalid references, and removes them. </summary>
         public void VerifyConnections() {
diff --git a/Scripts/NodeGraph.cs b/Scripts/NodeGraph.cs
index c2092e0..f17d1f4 100644
--- a/Scripts/NodeGraph.cs
+++ b/Scripts/NodeGraph.cs
@@ -1,4 +1,6 @@
 using System;
+using System.Linq;
+using System.Text.RegularExpressions;
 using System.Collections.Generic;
 using UnityEngine;
 
@@ -10,6 +12,9 @@ namespace XNode {
         /// <summary> All nodes in the graph. <para/>
         /// See: <see cref="AddNode{T}"/> </summary>
         [SerializeField] public List<Node> nodes = new List<Node>();
+        
+        /// <summary> All variables in the graph. </summary>
+        [SerializeField] public List<Variable> variables = new List<Variable>();
 
         /// <summary> Add a node to the graph by type </summary>
         public T AddNode<T>() where T : Node {
@@ -28,6 +33,7 @@ namespace XNode {
 #endif
             nodes.Add(node);
             node.graph = this;
+            node.Init();
             return node;
         }
 
@@ -44,6 +50,7 @@ namespace XNode {
 #endif
             nodes.Add(node);
             node.graph = this;
+            node.Init();
             return node;
         }
 
@@ -60,9 +67,10 @@ namespace XNode {
             nodes.Remove(node);
         }
 
-        /// <summary> Remove all nodes and connections from the graph </summary>
+        /// <summary> Remove all nodes, connections and variables from the graph </summary>
         public void Clear() {
             nodes.Clear();
+            variables.Clear();
         }
 
         /// <summary> Create a new deep copy of this graph </summary>
@@ -74,6 +82,7 @@ namespace XNode {
                 Node node = Instantiate(nodes[i]) as Node;
                 node.graph = graph;
                 graph.nodes[i] = node;
+                node.Init();
             }
 
             // Redirect all connections
@@ -85,5 +94,60 @@ namespace XNode {
 
             return graph;
         }
+
+        /// <summary> Add a variable to the graph </summary>
+        /// <param name="newVariable">the new variable data</param>  
+        /// <returns>the actual id used, avoiding duplicates</returns>     
+        public string AddVariable(Variable newVariable)
+        {
+            newVariable.id = GetSafeId(newVariable.id);
+            newVariable.typeString = GetSafeType(newVariable.typeString);
+            variables.Add(newVariable);
+            return newVariable.id;
+        }
+
+        /// <summary> Remove a variable from the graph </summary>
+        public void RemoveVariable(string id)
+        {
+            variables.Remove(GetVariable(id));
+        }
+
+        /// <summary> Get a variable from the graph </summary>
+        public Variable GetVariable(string id)
+        {
+            return variables.Find((Variable v) => v.id == id);
+        }
+
+        /// <summary> Get a duplication safe id </summary>
+        public string GetSafeId(string id)
+        {
+            id = id.ToLower();
+            id.Trim();
+            var rx = new Regex(@"\s");
+            rx.Replace(id, new MatchEvaluator((Match m) => "_"));
+            
+            var existingVariable = variables.Find((Variable v) => v.id == id);
+            if (existingVariable == null)
+                return id;
+
+            int index = 1;
+            
+            while (variables.Find((Variable v) => v.id == id + "_" + index.ToString()) != null)
+                index++;
+            return id + "_" + index.ToString();
+        }
+
+        /// <summary> Get a variable safe type </summary>
+        public static string GetSafeType(string type)
+        {
+			const string UE = "UnityEngine."; 
+			if (type.Contains(UE))
+			{
+				type = type.Substring(UE.Length);
+				type = type.Substring(0,1).ToLower() + type.Substring(1);
+			}
+
+            return type;
+        }
     }
 }
\ No newline at end of file
diff --git a/Scripts/Variable.cs b/Scripts/Variable.cs
new file mode 100644
index 0000000..474a4ff
--- /dev/null
+++ b/Scripts/Variable.cs
@@ -0,0 +1,55 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace XNode
+{
+	[System.Serializable]
+	public class Variable
+	{
+		public string id;
+		public string typeString;
+		public System.Type type
+		{
+			get
+			{
+				if (typeString == typeof(float).AssemblyQualifiedName) return typeof(float);
+				if (typeString == typeof(int).AssemblyQualifiedName) return typeof(int);
+				if (typeString == typeof(string).AssemblyQualifiedName) return typeof(string);
+				if (typeString == typeof(bool).AssemblyQualifiedName) return typeof(bool);
+				if (typeString == typeof(Vector3).AssemblyQualifiedName) return typeof(Vector3);
+				return typeof(Object);
+			}
+		}
+
+		public object Value
+		{
+			get
+			{
+				if (typeString == typeof(float).AssemblyQualifiedName) return floatValue;
+				if (typeString == typeof(int).AssemblyQualifiedName) return intValue;
+				if (typeString == typeof(string).AssemblyQualifiedName) return stringValue;
+				if (typeString == typeof(bool).AssemblyQualifiedName) return boolValue;
+				if (typeString == typeof(Vector3).AssemblyQualifiedName) return vector3Value;
+				return objectValue;
+			}
+		}
+
+		public string stringValue;
+		public float floatValue;
+		public int intValue;
+		public bool boolValue;
+		public Vector3 vector3Value;
+		
+		// more here
+
+		public Object objectValue;
+
+
+		public Variable()
+		{
+			id = "new_variable";
+			typeString = typeof(float).AssemblyQualifiedName;
+		}
+	}
+}
diff --git a/Scripts/Variable.cs.meta b/Scripts/Variable.cs.meta
new file mode 100644
index 0000000..a68dc79
--- /dev/null
+++ b/Scripts/Variable.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 81f7d4c8803ebee4c903b0976f780d95
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: