This is JOSM version runnable from a USB stick under Windows. See JOSM USB stick. Here is the source code.
Send patches to:
git config format.subjectPrefix 'PATCH josm-on-usb-stick'
git config sendemail.to '~qeef/dev@lists.sr.ht'
The project is published under MIT License. The OpenJDK, that is downloaded and published with CI, is licensed under GNU General Public License, version 2, with the Classpath Exception.