User Interface (1.4) - Scratch Wiki

File Menu (1.4) - Scratch Wiki

Scratch 3.0, Scratch Wiki

Block Categories (1.4) - Scratch Wiki

Development of Scratch 1.0 - Scratch Wiki

Scratch 2.0 - Scratch Wiki

Scratch 1.0, Scratch Wiki

Project - Scratch Wiki

ReactOS - Wikipedia

A list of design concepts every UX/UI designer should learn

Bitmap Graphics - Scratch Wiki

The Scratch user interface. Download Scientific Diagram