Modern Smalltalk programming system with fast execution environments across all major platforms including macOS, Windows, and Linux. It is known for its implementation of the Morphic graphical framework, fostering low-effort, interactive application development. Squeak's rich history includes its derivation from Smalltalk-80 and collaboration with entities like Disney, HP Labs, and Y Combinator. It is renowned for educational tools like Scratch and innovative user interface frameworks such as Morphic, Etoys, and Tweak.