- WPF - feels a little outdated, windows only but reliable (windows only)
- UWP (windows only)
- wxWidgets
- Electron (uses chromium, heavyweight and slow - used by most apps now... spotify,discord,skype and many others)
- Flutter ( https://github.com/flutter/flutter/wiki/Desktop-shells )
- https://sciter.com/ (https://www.reddit.com/r/programming/comments/a8vkzm/sciternode_as_an_alternative_to_electron/) - can buy source code
- QtWidgets/QtQuick - mainly C++ crossplatform (used by telegram) commercial license is expensive but can use open source comercially too with dynamic linking (LGPL 3)
- Unity3D
- imgui
- nuklear
- cegui
- mygui
https://ultralig.ht/ (lightweight alternative, no bindings, only C++, by creator of awesomium, weird license, no way to see the source code )- weird licenseNeutralino - (uses IE on windows - bad)https://deskgap.com/ (similar to neutralino)