Scratch
Programming language
Scratch is a block-based visual programming language and website targeted primarily at children 8-16 to help learn code. Users of the site can create projects on the web using a block-like interface. Wikipedia
Influenced: ScratchJr
Implementation language: Squeak (Scratch 0.x, 1.x); ActionScript (Scratch 2.0); JavaScript (Scratch 3.0)
License: GPLv2 and Scratch Source Code License
Paradigm: Event-driven, visual, block-based programming language
OS: Microsoft Windows, macOS, Linux (via renderer), HTML5