Squeak

Squeak is an open-source programming environment and language based on the Smalltalk programming language. It provides a platform for creating and running interactive applications, especially those involving graphics and multimedia. Squeak features a visual development workspace where programmers can modify running code in real-time, making it highly flexible for experimentation and education. It’s used in research, teaching, and creative projects due to its ease of use, extendability, and support for building dynamic, live objects and systems. Overall, Squeak is a versatile tool for developing and exploring software in a highly interactive manner.