Topics / #playground

Playground projects on GitHub

Playground environments for experimenting with models or code.

As of , the most-starred Playground projects on GitHub are free-programming-books (399.5K stars), TypeScript (111.5K stars) and prettier (52.4K stars). GitHub.Locker tracks 11 Playground repositories with 706.7K stars combined. The fastest-growing on October 18 was free-programming-books, with +149 stars in a day.

11Projects
706.7KStars in total
+264Stars in a day
Browse in the catalog →github.com/topics/playground ↗

Hot right now

Most stars gained in a day · Oct 18

+149

free-programming-books

EbookFoundation/free-programming-books · ★ 399.5K

It is a huge, community-maintained list of freely available programming books and other learning resources in many human languages; it started as a clone of a famous StackOverflow list and has grown to become one of GitHub's most popular repositories.

+34

opik

comet-ml/opik · ★ 22.7K

Opik is an open-source platform for debugging, evaluating, and monitoring LLM applications, RAG systems, and agentic workflows, with tracing, automated evaluation, and production dashboards.

+30

langfuse

langfuse/langfuse · ★ 36K

Langfuse is an open source LLM engineering platform for tracing, evaluating, and debugging LLM and agent applications, with prompt management and a playground built in.

+22

Observal

Observal/Observal · ★ 4.5K

Observal is a self-hosted control plane and registry for internal AI components, letting teams package, discover, and share Skills, MCP servers, and Agents with built-in usage insights.

The all-time top

11 projects · by stars

  1. #1 · EbookFoundation/free-programming-books

    free-programming-books

    It is a huge, community-maintained list of freely available programming books and other learning resources in many human languages; it started as a clone of a famous StackOverflow list and has grown to become one of GitHub's most popular repositories.

    399.5K
  2. #2 · microsoft/TypeScript

    TypeScript

    TypeScript is a language for application-scale JavaScript: JavaScript extended with a type system, developed by Microsoft for building large applications.

    111.5K
  3. #3 · prettier/prettier

    prettier

    Prettier is an opinionated code formatter: point it at a project and it keeps the whole codebase in one consistent code style.

    52.4K
  1. 4

    monaco-editor

    46.9Kmicrosoft/monaco-editor · JavaScript

    Monaco Editor is the browser-based code editor that powers VS Code, packaged as a JavaScript library for embedding editors in web apps.

  2. 5

    langfuse

    36Klangfuse/langfuse · TypeScript

    Langfuse is an open source LLM engineering platform for tracing, evaluating, and debugging LLM and agent applications, with prompt management and a playground built in.

  3. 6

    opik

    22.7Kcomet-ml/opik · Python

    Opik is an open-source platform for debugging, evaluating, and monitoring LLM applications, RAG systems, and agentic workflows, with tracing, automated evaluation, and production dashboards.

  4. 7

    Design-Patterns-In-Swift

    15.2Kochococo/Design-Patterns-In-Swift · Swift

    A cheat-sheet collection of classic Gang of Four design patterns implemented in Swift 5.0, organized by Behavioral, Creational, and Structural categories.

  5. 8

    AudioKit

    11.5KAudioKit/AudioKit · Swift

    AudioKit is an audio synthesis, processing, and analysis platform for building sound and music apps on iOS, macOS (including Catalyst), and tvOS.

  6. 9

    openplayground

    6.3Knat/openplayground · TypeScript

    openplayground is a self-hosted LLM playground you run on your laptop: a web UI for trying out, tuning, and comparing models from many different providers.

  7. 10

    Observal

    4.5KObserval/Observal · Python

    Observal is a self-hosted control plane and registry for internal AI components, letting teams package, discover, and share Skills, MCP servers, and Agents with built-in usage insights.

  8. 11

    Bud-Decision-Studio

    110BudEcosystem/Bud-Decision-Studio · HTML

    Bud Decision Studio is a cross-platform desktop app and local serving system for 'decision models' (Jev-like 'System One' models): you give it a situation and typed questions, and it returns a calibrated probability for every allowed answer instead of generated text.

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