Pharo

Pharo is an open-source programming language and development environment built around a pure object-oriented model. Everything in the system is an object, and computation happens through messages, which gives the language a small, uniform syntax that can be learned quickly. Rather than separating editing, compiling, and running, Pharo presents a single live environment where the program and its tools coexist.

The core experience is immediate feedback. Developers can modify code while the system is running, inspect objects directly, and debug without restarting. The environment bundles an IDE and runtime together, so testing and production work happen in the same space. A command-line bootstrap and image-based workflow make it easy to start experimenting with just a few commands.

Pharo is aimed at programmers interested in live programming, object-oriented design, and dynamic languages, as well as educators who want a compact language for teaching. A free MOOC with thousands of registered participants provides a structured entry point, and the community shares stories, newsletters, and documentation for further learning.

New users should begin with the official download and the MOOC, then explore the image-based workflow to understand how code, tools, and runtime are integrated. Because the ecosystem is smaller than mainstream platforms, checking library availability before committing to a project is wise. Overall, Pharo offers a distinctive, self-contained programming expe