Free AI Tools for Developer tools

A deadline-aware LLM router that reduces AI inference costs by automatically finding cheaper service tiers within a user-specified time window.

Open-source tool running specialized AI agents to review code, sync docs, perform deep QA testing, and distill repository knowledge on a schedule.

Open-source CLI, debug agents, and browser tools for building and maintaining reliable web integrations.

Open-source context engineering layer for AI agents that reduces token usage by ~80% and improves accuracy by selectively providing relevant tools and skills.

Kit for AI provides persistent memory and document conversion for AI agents via MCP and REST, enabling agents to remember, search, and cite knowledge from any file or URL.

IQVigilant is an AI-native dynamic engine for building enterprise-grade applications with deterministic AI agents, natural language querying, and no-code page building.

Infrastructure for AI agents to connect, communicate, and earn — with outbound-only, real-time streaming, and built-in billing.

Agentcard provides agent-friendly card issuing and payment infrastructure for AI agents, enabling 5-minute setup and autonomous purchases.

UnitPay is a billing infrastructure for AI-native companies that meters usage, enables flexible pricing, and tracks margins.

Jacquard is a small programming language designed for running, reviewing, and trusting programs written by machine-learning models and reviewed by people.

A deadline-aware LLM router that reduces AI inference costs by automatically finding cheaper service tiers within a user-specified time window.

Open-source tool running specialized AI agents to review code, sync docs, perform deep QA testing, and distill repository knowledge on a schedule.

Open-source CLI, debug agents, and browser tools for building and maintaining reliable web integrations.

Open-source context engineering layer for AI agents that reduces token usage by ~80% and improves accuracy by selectively providing relevant tools and skills.

Kit for AI provides persistent memory and document conversion for AI agents via MCP and REST, enabling agents to remember, search, and cite knowledge from any file or URL.

SonOf is an agentic engineering service that ships production code into your existing product—connect your repo, get a free audit, approve tickets, and pay only when code ships.

IQVigilant is an AI-native dynamic engine for building enterprise-grade applications with deterministic AI agents, natural language querying, and no-code page building.

Infrastructure for AI agents to connect, communicate, and earn — with outbound-only, real-time streaming, and built-in billing.

Agentcard provides agent-friendly card issuing and payment infrastructure for AI agents, enabling 5-minute setup and autonomous purchases.

UnitPay is a billing infrastructure for AI-native companies that meters usage, enables flexible pricing, and tracks margins.

Jacquard is a small programming language designed for running, reviewing, and trusting programs written by machine-learning models and reviewed by people.

Disposable, network-restricted Linux VMs for AI coding agents — give each agent its own machine instead of yours.

Juggler is an open-source AI coding agent with a visual workbench that gives you inspectable tool calls, branching threads, and editable context for hands-on control over LLM actions on your codebase.

A GitHub repository focusing on AI training AI techniques, currently unavailable.

A visualization tool that replays coding-agent sessions on a 3D map of your codebase.

PlugThis is an AI-powered Chrome extension builder that generates complete Manifest V3 extensions from plain English descriptions.

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.

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 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.

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

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.

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.

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

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.

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

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

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.

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.

N71 gives all your AI agents one shared context by maintaining a living knowledge graph connected to your tools, so every agent stays current without re-explaining.

Build production-ready full-stack apps from a prompt with built-in auth, database, and deployment—now with native mobile support.

Extract web data and automate browsers via a single API call, no scraper required.

Behavioral infrastructure for humanlike AI agents, providing APIs and models for social intelligence in group interactions.

A feature-rich Pomodoro timer that lives inside the Claude Code terminal, keeping focus without context switching.

A macOS app that keeps AI agent essentials like Claude and Codex sessions, token usage, and permissions visible in your Mac notch.

Local-first memory for AI coding agents. Automatically stores and recalls project context via MCP, offline, with ~35ms recall.

Kage is a git-native verification layer for coding agent memory that checks every claim against your code to prevent hallucinations and stale facts.

Vibe-zsh is an AI-powered Oh-My-Zsh plugin that transforms natural language into shell commands using any OpenAI-compatible API.

An open protocol for capability-aware AI routing, plus a reference router that routes between local and cloud AI models based on task, cost, and latency.

Open-source alternative to Claude in Slack: self-hosted AI agent that reads threads, answers questions, calls tools, and renders rich results.

A drop-in proxy that routes every prompt to the best AI model in <50ms, cutting costs 40-70% with just an endpoint change.