Slint

Is freely licensed?	✅
Source	https://github.com/slint-ui/slint
NLNet grant pages	https://nlnet.nl/project/Slint-FuSa-certification https://nlnet.nl/project/Slint-FunctionalSafety https://nlnet.nl/project/Slint-VisualEditor https://nlnet.nl/project/Slint-appmodularity https://nlnet.nl/project/Slint-layouts-2.0 https://nlnet.nl/project/SlintAndroid https://nlnet.nl/project/SlintiOS https://nlnet.nl/project/Slintify-LibrePCB