🪢 Open source LLM engineering platform: LLM Observability, metrics, evals, prompt management, playground, datasets. Integrates with OpenTelemetry, Langchain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.

Collection of awesome LLM apps with AI Agents and RAG using OpenAI, Anthropic, Gemini and opensource models.

🧩 The ultimate toolkit for working with APIs.

🌳 Tiny & elegant JavaScript HTTP client based on the Fetch API

Portable backend to ship fast.

Praat in Python, the Pythonic way

aeneas is a Python/C library and a set of tools to automagically synchronize audio and text (aka forced alignment)

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

Payload is the open-source, fullstack Next.js framework, giving you instant backend superpowers. Get a full TypeScript backend and admin panel instantly. Use Payload as a headless CMS or for buildi…

A fully open-source headless CMS that supports Markdown and Visual Editing

Metrics Observability & Troubleshooting

ORM

🐙 Guides, papers, lessons, notebooks and resources for prompt engineering, context engineering, RAG, and AI Agents.

Store and replay webhooks

Penpot: The open-source design tool for design and code collaboration

Run your GitHub Actions locally 🚀

TDungeon is a small adventure game that runs in the Typescript type system

❯ Lightweight, beautiful and user-friendly interactive prompts

A tool for glamorous shell scripts 🎀

Jargon from the functional programming world in simple terms!

Dojo for Libeo backend architecture

Clean Code concepts adapted for TypeScript

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

Relocate resource intensive third-party scripts off of the main thread and into a web worker. 🎉

A highly extensible Markdown editor. Version control, AI Copilot, mind map, documents encryption, code snippet running, integrated terminal, chart embedding, HTML applets, Reveal.js, plug-in, and m…

CSS custom properties to help accelerate adaptive and consistent design.

💾 Unstorage provides an async Key-Value storage API with conventional features like multi driver mounting, watching and working with metadata, dozens of built-in drivers and a tiny core.

🍴 A tasty toolset for Vue.js 🛠 - Lightweight, functional components to boost your next project.

💯 Curated coding interview preparation materials for busy software engineers