pharo-project/pharo

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

1482 stars · 431 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Pharo is a pure, reflective, dynamically typed object-oriented programming language in the Smalltalk tradition, shipped with an immersive live IDE and a large standard library. This repository contains the sources of the Pharo image, which is bootstrapped and run on a separate virtual machine.

Use cases

• learn object-oriented programming with a live Smalltalk environment
• prototype applications with immediate feedback and live programming
• build server-side applications with a minimal headless Pharo image
• explore reflective metaprogramming and dynamic language internals
• teach programming courses using the free Pharo MOOC
• debug running systems by editing code on the fly

When to choose

• you want a pure object-oriented language with everything being an object
• you value live, image-based development with an exceptional debugger
• you need an open-source (MIT) full-stack language and environment
• you are teaching or learning OOP with rich free books and MOOCs

When to avoid

• you need a mainstream language with large hiring pools and ecosystem
• you require static typing or compile-time guarantees
• you want a conventional file-based workflow rather than image-based development
• your deployment target depends on libraries outside the Pharo ecosystem

Facets

application · maturity active

programming-language interpreter developer-tools programming-languages developer-tools cross-platform cross-platform windows smalltalk live-programming reflective ide object-oriented image-based dynamic-language linux macos

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