Best Free AI Developer Tools

DeerFlow

development

4.7

Open-source super agent harness that orchestrates multi-agent workflows with sandboxes, memory, and built-in skills for research and automation.

Best for: Enterprise multi-agent workflows

Cursor

development

4.8

AI-powered code editor with autonomous agents, multi-model support, and Automations for triggering agents via code changes, Slack, or timers.

Best for: Autonomous coding agents

Entire Checkpoints

development

4.3

Open-source CLI that captures AI coding agent sessions (prompts, transcripts, context) alongside your git commits, so teams can review how code was written.

Best for: Auditability of agent-written code

OpenCode

development

4.6

Open-source AI coding agent for the terminal, with multi-session workflows and support for many models/providers.

Best for: Terminal-first workflows

DiffSense

development

4.4

Local AI git commit message generator for Apple Silicon Macs (privacy-first, no API required).

Best for: Apple Silicon developers

Agent Sandbox

development

4.4

A Kubernetes-native sandbox for running untrusted, agent-generated code with strong isolation.

Best for: Running untrusted agent code

ccpm

development

4.5

Project management workflow for Claude Code using GitHub Issues and Git worktrees for parallel agent execution.

Best for: GitHub-based teams

Kimi Code

development

4.5

AI coding agent CLI from Moonshot AI ( makers of Kimi), with terminal-based coding, IDE integration via ACP, and VS Code extension.

Best for: Terminal-first developers

CreateOS

development

4.3

Unified AI-native workspace for building, deploying, and scaling applications—from idea to live URL in under 10 minutes.

Best for: Unified build-deploy workflow

GitHub Copilot SDK

development

4.5

Programmatic SDK to embed GitHub Copilot CLI engine into custom apps, enabling agentic AI coding workflows.

Best for: Building custom AI coding agents

Heretic

development

4.2

Open-source tool that automatically removes censorship from transformer-based language models using directional ablation.

Best for: Automatic model decensoring

GLM-5

development

4.5

Open-source LLM with 744B parameters, featuring enhanced coding and agentic capabilities—approaches Claude Opus 4.5 in coding benchmarks.

Best for: Cost-sensitive projects

PicoClaw

development

4.5

Ultra-lightweight personal AI assistant that runs on less than 10MB RAM on $10 hardware, built in Go.

Best for: Embedded AI projects

WebMCP

development

4.4

Google's new protocol enabling websites to communicate directly with AI agents, replacing screenshot-based browsing with structured data interaction.

Best for: Web developers wanting agent-ready sites

Tambo

development

0.0

Open-source generative UI toolkit for React that enables AI agents to render and interact with your components dynamically.

Best for: React developers

Sarvam AI

development

4.2

Indian AI startup's multilingual LLM platform featuring 30B and 105B parameter models trained on Indian languages, supporting all 22 scheduled languages.

Best for: Indian language applications

EVMbench

development

4.5

Open-source benchmark evaluating AI agents' ability to detect, patch, and exploit smart contract vulnerabilities on the Ethereum Virtual Machine.

Best for: AI agent evaluation

Architect by Lyzr

development

4.4

Prompt-to-production agentic app builder with built-in governance, RAG pipelines, and Next.js UI deployment.

Best for: Fast prototyping to production

Claude Code Security

development

4.6

AI-powered vulnerability scanning that scans codebases and suggests targeted patches for human review.

Best for: Complex vulnerability detection

Weaviate Agent Skills

development

4.3

Open-source repository that equips AI coding agents with precise tools for building production-ready Weaviate applications.

Best for: Open-source vector database integration

Mocha

development

4.3

Full-stack AI no-code web app builder for non-technical small business users to build and publish projects using only text prompts.

Best for: Non-technical users wanting full-stack apps

Google Opal

development

4.6

Free zero-code AI app builder from Google Labs that creates mini web apps using natural language, chaining multiple AI models and tools.

Best for: Non-technical users

Tripo AI

design

4.4

AI-powered 3D model generator that transforms text prompts or images into production-ready 3D assets with auto-rigging, texturing, and multi-format export.

Best for: 3D model generation

Antigravity

development

4.6

Cloud-native AI IDE with 2M token context, autonomous agents, and Gravity Mode for agentic coding workflows.

Best for: Large codebases

Lovable

development

4.5

Full-stack AI app builder that generates complete applications with front-end, back-end, database, and authentication from natural language.

Best for: Full-stack web apps

Superset IDE

development

4.7

Open-source terminal IDE that runs 10+ parallel AI coding agents using isolated Git worktrees.

Best for: Parallel agent execution

The Agency

development

4.7

Open-source library of 61 specialist AI agents across engineering, marketing, sales, and design workflows.

Best for: Reusable specialist agent templates

v0 by Vercel

development

4.6

Generate full-stack React/Next.js apps and websites from natural language prompts with visual editing and one-click deployment.

Best for: Quick prototyping

Bolt.new

development

4.5

Build full-stack apps and websites by chatting with AI in the browser, with integrated hosting, databases, and deployment.

Best for: Browser-based development

Windsurf

development

4.5

The first agentic IDE combining deep codebase understanding with real-time awareness to keep developers in flow state.

Best for: Multi-IDE users

Replit Agent

development

4.4

An AI coding agent that independently builds, designs, and deploys full-stack applications with team collaboration.

Best for: Non-technical builders

NemoClaw

development

4.5

NVIDIA's open-source enterprise security and privacy layer for OpenClaw AI agents, built on NeMo and NIM for regulated environment deployments.

Best for: Enterprise compliance

Darwin Gödel Machine

development

4.2

A self-improving AI coding agent by Sakana AI that iteratively rewrites its own code to boost performance on programming benchmarks, combining Darwinian evolution with Gödelian self-reference.

Best for: AI self-improvement research

Qwen 3.5 Small

development

4.6

Alibaba's compact multimodal AI model family (0.8B to 9B parameters) delivering surprisingly strong performance for on-device applications, edge computing, and lightweight agent tasks.

Best for: On-device deployment

DeepSeek V4

development

4.7

Open-source 685B parameter mixture-of-experts model with exceptional coding capabilities and 128K context window.

Best for: Open-source requirements

Gemma 4 31B

development

4.5

Google's open-weights 31B parameter model optimized for efficiency, safety, and on-device deployment with Gemini-quality capabilities.

Best for: Consumer hardware deployment

TurboQuant

development

4.8

Revolutionary KV cache compression achieving 6x memory reduction and 8x speedup for LLM inference with zero accuracy loss.

Best for: Memory-constrained deployments

Ollama

development

4.8

Local-first LLM runtime for running models on your hardware with local privacy, no per-token API costs, and offline-capable workflows.

Best for: Privacy-first deployments

Linear

productivity

4.7

Streamlined issue tracking and project management tool built for modern software teams with keyboard-first design.

Best for: Engineering teams wanting speed and simplicity

LangChain

developer tools

4.4

Open-source framework for building LLM-powered applications with chains, agents, and retrieval-augmented generation.

Best for: Developers building LLM applications

Vercel AI SDK

developer tools

4.6

Open-source SDK for building AI-powered web applications with streaming, tool calling, and multi-provider support.

Best for: Web developers building AI-powered apps

IBM Granite

development

4.1

IBM family of open-source AI models for enterprise. Code, language, and time-series models with commercial-friendly licenses.

Best for: Enterprise-grade open-source models

OpenClaw

development

4.8

Viral open-source personal AI agent with 368K+ GitHub stars, a local-first gateway, tool calling, skills, and multi-channel messaging.

Best for: OpenClaw search demand

Hermes Agent

development

4.7

Self-improving open-source agent CLI from Nous Research with memory, cron scheduling, tools, skills, MCP, and multi-provider routing.

Best for: Persistent memory

ToolJet

development

4.3

Open-source low-code platform for building business applications in minutes. 37K GitHub stars, connects to 50+ data sources.

Best for: 37K GitHub stars

OpenAI Agents SDK

development

4.6

OpenAI open-source Python SDK for building multi-agent AI systems with tool use, guardrails, and production-ready patterns.

Best for: Official OpenAI-backed Python SDK

Evolver

development

4.1

Self-evolving AI agents that autonomously improve their own prompts and strategies. 6K GitHub stars.

Best for: Autonomous self-improvement

OpenCLI

development

4.4

Terminal-native AI coding assistant with 17K GitHub stars. Works with any LLM, integrates with existing CLI workflows.

Best for: 17K GitHub stars

Ace

development

4.5

GitHub Next's agentic coding workspace with AI-native IDE for autonomous development

Best for: AI-powered

Rapunzel

development

4.5

Tree-style tabs for Claude Code, Codex, and Gemini CLI agents

Best for: AI-powered

Polynya

development

4.5

Turn Postgres into AI-native workspaces with semantic search and agent memory

Best for: AI-powered

Mdlens

development

4.5

Reduce token spend and boost retrieval on Markdown-heavy codebases

Best for: AI-powered

AI Memory DB

development

4.5

Biological decay model for AI memory with 52 percent recall optimization

Best for: AI-powered

CodeRabbit AI

development

4.5

AI-powered code review with context-aware suggestions and PR summaries

Best for: AI-powered

Windsurf Editor

development

4.5

AI-native IDE with agentic coding, Cascade context, and multi-file editing

Best for: AI-powered

CrewAI

development

4.6

Multi-agent AI framework for building autonomous agent teams that collaborate to complete complex tasks.

Best for: Build agent teams not single agents

AgentGPT

development

4.4

Web-based autonomous AI agent platform. Define goals and watch AI agents plan, execute, and iterate autonomously.

Best for: No coding required

Rivet

development

4.5

Visual IDE for building AI agents with drag-and-drop node graphs. By AI21 Labs.

Best for: Visual AI agent development

Bolt AI

productivity

4.6

AI-powered full-stack web development environment. Build, deploy, and ship web apps with natural language.

Best for: Full-stack in browser

Builder.io

productivity

4.4

Visual development platform with AI-powered code generation. Drag-and-drop web building with AI assist.

Best for: AI meets visual building

Bolt AI

AI App Builder

4.3

Build full-stack AI-powered web applications in your browser. Bolt AI combines AI assistance with instant cloud execution.

Best for: Browser-based full-stack development