Greenfoot

The software provides an interactive development environment for creating Java‑based “scenarios” that illustrate object‑oriented concepts. Users can write classes, define actors, and see their code run visually, with built‑in examples such as simple games and simulations. Documentation and tutorials guide beginners through opening a new scenario, editing code, and experimenting with features like timers and keyboard input.

It is aimed at students and educators who want to learn or teach object‑orientation using Java in a hands‑on, visual manner. The platform supports community‑shared scenarios, allowing learners to explore and modify a variety of sample projects ranging from card games to space battles.

The application runs on macOS, is considered stable, and includes a web interface for downloading, discussing, and browsing popular scenarios and collections. It emphasizes simplicity of setup—opening the program creates a starter scenario—and offers a share function for exporting projects.