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Judge0: Robust, fast, scalable, and sandboxed open-source online code execution system for humans and AI. It is listed under Development & Code on AI Registry as a free tool.
The tools below are approved listings in the same category, ordered by how closely their tags match Judge0. This is an automatic list. We have not written a researched verdict for Judge0 yet, so treat it as a shortlist and check each vendor's pricing page before switching.
Built from each tool's listing. Vendors can update their own listing after claiming it.
Browse, create, and edit AI agent files across Claude Code, Cursor, Codex, and 12 coding tools — from Obsidian.
Agentfiles is an Obsidian community plugin that gathers the skills, commands and agent definitions used by AI coding tools into a single panel inside an Obsidian vault. It automatically discovers these files across Claude Code, Cursor, Codex, Windsurf, Copilot, Amp, OpenCode and more than a dozen other tools, so a deve...
Make your agents learn from experience.
Agentic Context Engine, usually shortened to ACE, is an open source Python framework from Kayba that lets AI agents improve from their own experience without fine tuning, training data or a vector database. It keeps a Skillbook, a persistent collection of strategies that evolves with every task, and feeds those strateg...
Open source version of Claude Managed Agents.
Agentor is an open source Python framework from Celesto AI for building, deploying and operating long running AI agents. It includes tool use, MCP support, the A2A agent to agent protocol and durable execution, and a working agent with tools can be created and served in a few lines of code. It is designed for develope...
AI agents on autopilot.
AgentUse is an open source agent runtime for recurring work. Agents are defined as plain Markdown files, with model settings and capabilities in YAML frontmatter and the instructions written in natural language, and AgentUse supplies the operating layer around them: the agent loop, tools, durable sessions, schedules, a...
Clone any website with one command using AI coding agents
AI Website Cloner Template is an open source project template that has an AI coding agent recreate an existing website as a clean Next.js application. After setting up a copy of the repository, the user opens it in an agent with browser access and runs a clone website command with the target URL. The agent inspects the...
Aiden — an autonomous AI agent and work engine built solo.
Aiden is an open source personal AI runtime from Taracod that it describes as a DevOS: an agent that runs on your own machine, takes a goal written in plain English, turns it into a durable job made of steps, and executes those steps with approvals. After each action it checks that the action actually worked, records e...