I'v developed
https://github.com/bung87/crowngui and some libs that it depends on , build tools.
I also made a example app https://github.com/bung87/crown_excel for macOS users.
these things take times, for the windows and linux, am not familiar with , I hope somebody could help me.
anyone interested can check the example app , just few lines that's what I thoughts what this framework is.
I checked other similar projects , they all wraps c or cpp file, I want only hold manageable nim code, I've port macOS c parts to nim that reduce about 100 lines code.
for windows we can use https://github.com/khchen/winim and https://github.com/khchen/wNim, for linux am sure there are gtk nim wrapper libs.