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

Sourcebot is a self-hosted tool that helps humans and agents understand your codebase.

Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.

Autonomous coding agent right in your IDE, capable of creating/editing files, executing commands, using the browser, and more with your permission every step of the way.

Event Driven Orchestration & Scheduling Platform for Mission Critical Applications

Build, deploy, and orchestrate AI agents. Sim is the central intelligence layer for your AI workforce.

🪓 Run Background Tasks at Scale

The open-source TypeScript SDK for running AI coding agents in sandboxes. One unified API — swap agents and infrastructure providers without changing your code.

The coding agent built for the web. stagewise is a purpose-built browser for developers with a coding agent built right in.

A visual no-code theme editor for shadcn/ui components

🫖 Status page with uptime monitoring & API monitoring as code 🫖

Visually design your AsyncAPI files and event-driven architecture.

The most comprehensive authentication framework

Lightweight server monitoring with historical data, docker stats, and alerts.

The Campsite monorepo

coss.com is the new holding company of cal.com, the pioneers of open source scheduling infrastructure and cal.com continues to be the 'google search' of our alphabet.

#1 Open-Source Captable, an alternative to Carta, Pully, Angelist and others.

Make your first Pull Request on Hacktoberfest 2025. Don't forget to spread love and if you like give us a ⭐️

Codú's open-source codebase. A space for coders. Visit our community!

EMR based on FHIR

Analyze and compare geopolitical relations between countries using the latest data based on few factors. You will see a calculated score also.

The open alternative to Salesforce, designed for AI.

Code editing environment with an AI copilot and real-time collaboration

🎧 Open source music streaming app! Available for both desktop & mobile!

Learn Low Level Design (LLD) and prepare for interviews using free resources.

Explain complex systems using visuals and simple terms. Help you prepare for system design interviews.

Appwrite® - complete cloud infrastructure for your web, mobile and AI apps. Including Auth, Databases, Storage, Functions, Messaging, Hosting, Realtime and more