The best Open Source projects of 2026.

Measure and cap MCP context bloat before agents run

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.

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.