Best Free AI Developer Tools tools

AI-powered social listening tool that monitors Reddit, X, LinkedIn, and 10+ other platforms, filters mentions with AI, and delivers them to your stack via API, Slack, or webhooks.

A maintained collection of agent skills for modern browser Web AI APIs including Prompt API, Language Detector, Translator, Writing Assistance, Proofreader, WebMCP, and WebNN.

Aura is an open-source intelligence layer for AI coding agents that unifies multiple agents, provides AST-level diffs, and verifies changes against goals.

A unified AI gateway providing access to 300+ leading models through one EU-hosted, GDPR-compliant API with an OpenAI SDK-compatible interface.

Open-source framework for building AI agents with flexible capabilities, tool integration, and community-driven development.

Unified AI API gateway providing access to top-tier LLMs, image, video, and coding models at affordable prices.

Full-stack framework for coding agents that combines a TypeScript model with schema, policies, server functions, and typed clients for live sync, auth, storage, and one-binary deploy.

A stealth browser designed for AI agents to browse the internet seamlessly, overcoming restrictions that treat agents as second-class.

Selvedge captures the reasoning behind AI agent code changes, storing why a change was made alongside the code for future reference.

Kastra is an authorization layer for AI systems that checks every action against policy before it runs.

AI-powered social listening tool that monitors Reddit, X, LinkedIn, and 10+ other platforms, filters mentions with AI, and delivers them to your stack via API, Slack, or webhooks.

A maintained collection of agent skills for modern browser Web AI APIs including Prompt API, Language Detector, Translator, Writing Assistance, Proofreader, WebMCP, and WebNN.

Aura is an open-source intelligence layer for AI coding agents that unifies multiple agents, provides AST-level diffs, and verifies changes against goals.

A unified AI gateway providing access to 300+ leading models through one EU-hosted, GDPR-compliant API with an OpenAI SDK-compatible interface.

A unified API platform for LLM inference with cost optimization, routing, observability, and automatic failover.

Open-source framework for building AI agents with flexible capabilities, tool integration, and community-driven development.

Unified AI API gateway providing access to top-tier LLMs, image, video, and coding models at affordable prices.

Full-stack framework for coding agents that combines a TypeScript model with schema, policies, server functions, and typed clients for live sync, auth, storage, and one-binary deploy.

A stealth browser designed for AI agents to browse the internet seamlessly, overcoming restrictions that treat agents as second-class.

Selvedge captures the reasoning behind AI agent code changes, storing why a change was made alongside the code for future reference.

Kastra is an authorization layer for AI systems that checks every action against policy before it runs.

FableCut is an open-source browser video editor with a JSON timeline that AI agents can drive via MCP and REST APIs.

Abralo is a native desktop app for running multiple Claude Code agents simultaneously with a clean interface, token monitoring, and walk-away control.

Frugon is a free, open-source LLM cost analyzer that identifies where your LLM bill leaks by analyzing your call logs locally.

Polygres combines PostgreSQL hosting with native graph traversal, HNSW vector search, and hybrid retrieval APIs for AI agent workflows.

Turn your AI coding agent into a finance and economy analyst with real-time access to official statistics and live market data.

Faithful, 100% local OCR Chrome extension for text, code, formulas, and tables with no hallucination.

Deterministic context folding engine for long-running AI agent sessions. Reduces costs by keeping provider prompt caches hot and avoiding LLM summarization calls.

An open, deterministic evidence layer for enterprise AI agents that grounds every claim in traceable source records and gates actions behind approval.

Edgee is an agent gateway that cuts token costs up to 50% by compressing, routing, and observing LLM traffic for coding agents.

AI search infrastructure designed for agents, delivering structured, secure, and high-quality data with smart intent routing.

Tamper-evident runtime records for AI agents: hash-chained audit trail that vendors cannot edit.

CLI for AI agents to read, edit, and comment on .docx files with full format fidelity.

Open-source AI coworker for desktop that indexes your work into a living knowledge graph and provides built-in surfaces for email, meetings, browsing, and coding.

A macOS native app that tracks real-time costs and usage limits for Claude Code and Codex from the menu bar and widgets.

TryCase gives your coding agent a disposable Linux desktop to run your app, test it like a user, and send back proof: screenshots, recordings, and logs.

DocsAlot turns scattered product knowledge into polished, agent-readable documentation and AI visibility audits for onboarding.

A branchless, zero-jitter ingress router for 32-GPU distributed mesh networks utilizing JAX/XLA and NCCL.

A collection of AI-powered DNS skills and tools for domain operations, including SPF flattening, homoglyph detection, and domain lookalike analysis.

Skeights serializes fitted scikit-learn models to safetensors and JSON, replacing insecure pickle with a safe, inspectable format.

A Swift framework for building stateful, multi-agent AI workflows with type-safe tools, crash resilience, and native concurrency.

An AST-powered, local-first CLI that visualizes complex system architectures and enforces architectural boundaries via instant Git hooks.

A self-hosted, framework-agnostic runtime for autonomous agents that records and replays every step for debugging and improvement.

Open-source security layer for AI agents enforcing RBAC, human approvals, and signed audit logs.

Dike is a compliance gateway for AI products in the EU, providing audit-grade logging, human oversight, and incident reporting via a simple proxy.

Review your rendered markdown site like a Google Doc: select a passage, comment, and an AI agent resolves it into a clean git diff. Local-first, in-browser.

Let coding agents see your browser by capturing screenshots of open tabs via a CLI and browser extension.

Terminai wraps your terminal to provide on-demand access to AI agents with read and approval-gated write access.

Glaze by Raycast is a desktop app builder that lets anyone create native macOS applications using natural language descriptions, with full offline capability and OS integration.

Web scraping and crawl API that provides markdown, HTML, brand data, images, and structured data extraction for AI agents.

Scan your site for AI visibility issues and get production-ready config files to fix them.

A terminal emulator that captures every AI agent exchange, tags it, and indexes it for cross-agent search, keeping your memory on your machine.

A personal blog and research site for Solidity smart contract development, offering insights and code examples.

Contextify keeps a private, searchable timeline of Claude Code and Codex sessions forever, with local AI summaries powered by Apple Intelligence.

A platform for building and running durable AI agents with managed sessions, event logging, and automatic crash recovery.

Run any LLM locally on your Mac faster than LM Studio or Ollama, with chat, coding agents, images, video, and voice, all fully offline and open source.

A transparent proxy that shows every real tool call between your AI client and MCP servers, live in your terminal.

Mirrors turns your production traces into an isolated copy of your agent's environment so you can test changes safely.

An open-source CLI for fast local search across your past coding agent sessions.

A secure file system and code execution sandbox for AI agents with built-in job queues, Docker isolation, and execution history.

AI-powered social listening tool that monitors Reddit, X, LinkedIn, and 10+ other platforms, filters mentions with AI, and delivers them to your stack via API, Slack, or webhooks.

A maintained collection of agent skills for modern browser Web AI APIs including Prompt API, Language Detector, Translator, Writing Assistance, Proofreader, WebMCP, and WebNN.

Aura is an open-source intelligence layer for AI coding agents that unifies multiple agents, provides AST-level diffs, and verifies changes against goals.