I've now tried the "hello world" program for all those that claim to be cross-platform (at least Linux & Windows). Most don't actually work on Windows, and all but one requires at least one `.so` or `.dll`.
The one exception is [NiGui](https://github.com/trustable-code/NiGui). This is pure Nim so doesn't need any extra shared libraries. Also, I found it worked fine on both Linux and Windows. I haven't tested it for performance or for comprehensiveness, and the documentation is rather sparse. However, it comes with a whole bunch of examples which are small enough to study and learn from. I really hope that _NiGUI_ gets the support it needs. For example, after decades, Python still has no native GUI library (although there have been many attempts, e.g., _PyGUI_ ). This makes it much harder to deploy Python GUI apps. Yet with _NiGUI_ deployment is easy since it is built right into the executable with no separate libraries.