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Free AI tools for engineers and developers
Free, open-source AI tools from GitHub that fit engineers and developers, explained simply.
- Updated 19 Oct 2026
Why these picks
These are free tools for people who write code, or who build apps with an AI coding helper like Claude Code or Codex. Many of them are add-ons that change how your AI helper works: they make it plan before it codes, test its own work, remember your project, or read fewer tokens so each session costs less. Others are full tools, like a database client, a light headless browser for AI agents, or a way to run Linux containers on a Mac. Every guide shows the install steps from the tool's own README, a ready prompt you can paste into your AI helper, and our honest pros and cons. Start with the one that fixes the problem you hit most this week.
29 free AI tools for engineers and developers
Newest first. Each card opens the full guide.
HyperFrames: Make AI Videos From HTML
HyperFrames is a free tool that makes AI video from HTML.
REA: Reverse Engineer Anything With Your AI Agent
REA (Reverse Engineer Anything) lets an AI agent look inside an app and explain how a feature works, with proof.
DBX: Free Database Client for 100+ Databases, With AI
Its AI helper turns plain English into database queries for you.
Moli: A Free, Light Headless Browser for AI Agents
It lets AI helpers read, search and use websites fast, while using far less memory than Chrome.
Cloudflare Security Audit: Free AI Code Security Check
It turns your AI coding helper into a careful reviewer that writes a clear report.
Hindsight: Free AI Agent Memory That Learns
It helps AI helpers remember past chats and learn from them.
Brag: A Free AI Launch Video Maker for Your Project
Type one command in Claude Code or Codex and it turns your project into a short video with music and share text.
Artemis: Google's Free AI Android Automation Tool
Type a task in plain English and an AI taps, swipes and tests apps on a real Android phone for you.
DeepSeek Harness: DeepSeek's Free Open-Source AI Agent
Every feature is a plugin you can swap or build, and it runs in your browser with one command.
Archify: Free AI Diagram Generator for Claude and Codex
Describe an idea, plan or codebase to Claude Code or Codex and get an interactive diagram as one shareable web page.
Colibri: Run Large AI Models Locally Without a GPU
Colibri is a free tool to run large AI models locally on the computer you already own.
Headroom: Reduce AI Token Costs for Free
It shrinks logs, files and data on your computer before your AI reads them, so answers stay the same.
Apple Container: Run Linux Containers on Mac for Free
Each one runs in a tiny virtual machine, tuned for Apple silicon and macOS 26.
Ponytail Skill: Make Your AI Coder Write Less Code
The Ponytail skill is one free prompt that makes your AI coding helper reuse what exists, write half the code, and still keep the tests and safety checks.
Understand Anything: Visualize Any Codebase for Free
Understand Anything is a free plugin that lets you visualize any codebase as a clickable map with plain-English notes, guided tours and a chat for questions.
Matt Pocock Skills: Free Claude Code Skills That Work
Matt Pocock skills are free add-ons that make Claude Code, Codex and Copilot ask better questions, test their work and keep your code tidy.
CodeGraph for Claude Code: Cut AI Coding Costs
CodeGraph for Claude Code builds a local map of your code, so your AI helper finds the right files in one step.
Karpathy Skills for Claude Code: One Free Rules File
Karpathy skills for Claude Code is one free rules file that makes your AI coder ask first, keep code simple and only change what you asked for.
Graphify Knowledge Graph: Free Project Map for AI Helpers
A graphify knowledge graph turns your code, docs, PDFs and videos into one clickable map, so your AI helper looks things up instead of guessing.
Caveman: Reduce Claude Code Token Usage for Free
Your AI helper gives short answers and reads less noise, so each session costs less.
Awesome DESIGN.md: Free AI Design System Files
Drop one in your project and Claude Code or Cursor builds pages in that site's style.
MemPalace: Free AI Memory for Claude Code, Stored Locally
It saves your chats word for word on your own computer and finds the right one later.
Cut Terminal Output Tokens for AI Coding: RTK Guide
It trims noisy command output before your AI coding helper reads it.
Karpathy autoresearch: AI That Runs Experiments Overnight
Karpathy autoresearch lets an AI agent tweak, train and test a tiny AI model on its own overnight, keeping only the changes that make it better.
gstack: Garry Tan's Free Claude Code Skills
gstack claude code skills turn Claude Code into a free virtual team: a CEO, designer, code reviewer, QA tester and release engineer.
Paperclip: Free App to Manage AI Agents Like a Company
Paperclip is a free, self-hosted app to manage AI agents like a company, with goals, an org chart, budgets, approvals and one dashboard for all the work.
ECC: The Free Claude Code Plugin With 311 Skills
ECC is a free Claude Code plugin with 71 agents, 311 skills, memory and a security scanner.
Superpowers: Free Claude Code Skills That Plan First
Superpowers is a set of free Claude Code skills that make your AI coder ask questions, write a plan, test and review its work before it calls a job done.
agent-browser: Free AI Browser Automation Tool by Vercel
It lets Claude Code, Codex and other AI helpers open sites, click, fill forms and read.
Apps you can use
Free and paid AI apps that fit engineers and developers. Prices come from each app's own pricing page, checked on the date shown.
LM Studio
Element Labs
Free app to download and run AI models on your own computer
Free plan + paid from $20/month
n8n
Build step-by-step automations and AI agents that link your apps
Free plan + paid from 20€/month, billed yearly
GitHub Copilot
GitHub
AI that suggests and writes code inside your code editor
Free plan + paid from $10/month
Devin
Cognition
AI coding helper and editor (Windsurf now points here) that writes code
Free plan + paid from $20/month
Claude Code
Anthropic
AI that works in your project folder and writes and fixes code
Paid from $20/month
Codex
OpenAI
OpenAI's coding helper that writes, tests, and fixes code for you
Free plan + paid from $8/month
Bolt
StackBlitz
Type what app or website you want and it builds it in your browser
Free plan + paid from $25/month
v0
Vercel
Describe a website or app screen and it builds a working version
Free plan + paid from $30/user/month
ComfyUI
Comfy Org
Free tool to build your own picture and video making steps, like Lego
Free plan + paid from $20/monthOpen source
Figma Make
Figma
Turn a written idea into an app screen design you can click through
Free plan + paid from $16/seat/month, billed yearly
Hugging Face
Huge library of free AI models and datasets you can try and share
Free plan + paid from $9/month
Most starred and how they are licensed
Stars are a rough sign of how many people find a tool useful.
Other groups
The same guides, sorted by who they fit.
FAQ
Are these AI tools for engineers and developers free?
All 29 tools here are open source on GitHub. By license: MIT (18), Apache-2.0 (9), Apache-2.0 / MIT (1), Apache-2.0 + BUSL-1.1 (1). A tool can be free while an AI service it connects to is not, so check the price row in each guide's at-a-glance table.
Which of these tools has the most GitHub stars?
REA, with 317.7K stars when our guide last checked (2026-10-18).
Do they work on Mac, Windows and Linux?
15 of the 29 guides that list platforms say Mac, Windows and Linux. Each guide's at-a-glance table names the platforms for that tool.
Which guide for engineers and developers is the newest?
HyperFrames: Make AI Videos From HTML (2026 Guide), published 2026-10-19.