Scratch
Scratch is a free, block-based visual programming language and online community developed by the MIT Media Lab. It allows users, especially children and beginners, to create interactive stories, games, and animations by dragging and dropping code blocks, without needing to write traditional text-based code. The platform includes a built-in editor, sharing features, and educational resources to foster computational thinking and creativity.
Developers should learn Scratch when teaching programming fundamentals to beginners, such as children or non-technical audiences, as it introduces core concepts like loops, conditionals, and variables in an intuitive, visual way. It's also useful for rapid prototyping of simple interactive projects or educational demos, and for understanding the basics of event-driven programming and user interface design in a low-stakes environment.