Scratch - Scratch is the programming language & online community where young people create stories, games, & animations.
Microsoft MakeCode Arcade - Drag n drop code to make and play games online and on various hardware
EduBlocks - Making the Transition from Scratch to Python easier.
Gandi IDE - Gandi IDE is a Scratch mod, it's a simple but powerful online game engine. An editor, interpreter, compiler, assets market, and MMO server are built inside. Realtime code, create and learn together right in your browser.
Blockly - Blockly is a library for building visual programming editors.
Codecademy - Learn the technical skills you need for the job you want. As leaders in online education and learning to code, we’ve taught over 45 million people using a tested curriculum and an interactive learning environment.