MIT License
Do whatever you want. Just keep the copyright notice.
Commercial use
✓ Yes
Modify
✓ Yes
Distribute
✓ Yes
Must open source changes
✗ No
Must attribute
✓ Yes
Patent grant
✗ No
What this license means
The MIT License is the most popular open source license. It lets you use, copy, modify, merge, publish, distribute, sublicense, and sell the software — with essentially no restrictions. The only requirement is that you include the original copyright notice and license text in any copy or substantial portion of the software.
When you encounter this license
Use MIT-licensed tools freely in any project — personal, commercial, proprietary. You can bundle it, modify it, sell products built with it. Just keep the license file somewhere in your project. This is the easiest license to work with.
Watch out for
No patent grant — if the software implements a patented algorithm, the MIT license doesn't protect you from patent claims. No warranty, no liability — standard for all OSS licenses.
Tools using MIT License (562)
Scalable overlay networking
The Photoshop alternative for Mac
The agent engineering platform
A command-line tool for Lark/Feishu Open Platform, built for humans and AI Agents. Covers core business domains including Messenger, Docs, Base, Sheets, Calendar, Mail, Tasks, Meetings, and more, with 200+ commands and 19 AI Agent Skills.
Send emails with Node.js
Next-gen testing framework powered by Vite
Open source fork of SQLite with open contributions
Tiny elegant HTTP client based on Fetch
Fully featured open source mail delivery platform
Create PDF files using React
A free, powerful, multi-purpose tool that helps you monitor system resources, debug software and detect malware. Brought to you by Winsider Seminars & Solutions, Inc. @ http://www.windows-internals.com
Turns an OpenAPI file into interactive API docs where readers can send real requests, plus an offline API client built to replace Postman.
Fast cross-platform build tool
Claude + Obsidian knowledge companion. Persistent, compounding wiki vault based on Karpathy's LLM Wiki pattern. /wiki /save /autoresearch
SMTP testing tool
"OpenHarness: Open Agent Harness"
Release engineering for Go
:mag: Quick file search & app launcher for Windows with community-made plugins
A static analyzer for Java, C, C++, and Objective-C
Multiplayer agent harness for work
This guide is for informational purposes only and does not constitute legal advice. For licensing decisions in commercial products, consult a qualified attorney.