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MooTool

MooTool is a free, open-source desktop app for Windows, macOS and Linux. Hi! Thanks for using MooTool. "Moo" is named after my daughter. It has 2,055 GitHub stars and is released under the MIT license. Its source code is on GitHub at rememberber/MooTool.

github.com/rememberber/MooTool (opens in a new tab)

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About MooTool

Hi! Thanks for using MooTool. "Moo" is named after my daughter. I keep building and improving MooTool to support my own day-to-day development work.

FAQ

MooTool FAQ

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Is MooTool free and open source?

Yes. MooTool's source code is public on GitHub under the MIT license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.

How do I install MooTool?

Download the installer for Windows, macOS and Linux from its GitHub Releases page (latest: next-electron-v1.3.5) or the project website.

Is MooTool still maintained?

The repository's most recent commit was on Oct 17, 2026. appsgit only lists apps whose repository had a commit in the last six months.