Some people from the Mustangproject are also involved in the open-source electron based e-invoice viewer “Quba” which released it’s first preview version (“0.1”) today, starting with UN/CEFACT CII support in a version for windows. The announcement has more details and of course the home page has a download button since today.
![Screenshot of Quba 0.1](https://www.mustangproject.org/wp-content/uploads/2021/03/2021_03_07_PM_0_1_screenshot.png)