Editor-Side Reference is a live tutorial with key aspects of Unity Editor-Side programming

Each sample is as simple and illustrative as possible.

Includes::
-Serialization
-Use and create custom Property Drawers
-Use and create Custom Decorator Drawer
-Create Context Menu
-Create a Toolbar
-Create your custom Window
-Use Gizmos and Handles
-PING scene and project elements
-Create awesome flags and EnumMask
-Extend native components and methods

Also includes:
-A render extension with exposed layers
-...