The best Open Source projects of 2026.

Measure and cap MCP context bloat before agents run

Share files instantly from your own cloud storage

Your AI research desk for learning, backtesting, and investing smarter.

C++, SDL 2 and SFML game engine for PC, Mobile, Nintendo Switch and Web.

Observability and replay infrastructure for AI agents.

Cage lets you programmatically create isolated environments ("sandboxes"), run commands inside them, and tear them down

The calm notes app for your Mac: plain Markdown files in a folder you own, with AI only when you ask.

Craft modern UIs faster with our extra-ordinary designed Shadcn UI components, blocks & templates.

Production-ready Shadcn dashboard kit built for modern teams

Open-source AI chatbot that automates customer support — self-hostable, free tier, human handoff.

Open-source, low-code platform to build API integrations and automate workflows.

Keep your secrets absolutely secure

Production-ready Remotion components you install as source and fully own.

AI powered writing editor

Cuts LLM API bills and Token costs by 40-70%.

Intelligence that really knows you

Native Git client with AI conflict resolution

First local Agent

Free open-source app to organize collections of retro games, movies, TV shows, anime, manga and books.

Pterocos – The free, no-login online code editor with AI chat and full VS Code‑style Monaco IDE

A modern UI component library built with Tailwind CSS and Shadcn architecture.

Jailbreak-test your AI app before your users do.

Self-hosted crypto trading platform with visual AI builder.