Hello, Darooma, you wrote: D> on mind comes only gtk on Rust and it is possible on wxWidgets Haskell'e. I do not know about gtk for Haskell'a, probably, approaches. All. D> - with ++ - I do not want D> - Python - I do not want, it is necessary, that source codes have been closed. D> - C# - about mono anything good as a whole did not hear. D> - Java - unless. Though, heard that there too for GUI jambs are. D> it is desirable, but it is optional, that it was . Similar on . What means I do not want? Be repelled that you know is better. Only do not say that you own all at level "". Here I own pluses, yes, and to Qt hands for 15 years and did not reach plainly. Wrote on wxWidgets everything, on the decision will be more superficial. Probably would select it. And so, which year not from , would look on at last. If with affairs did not go, would select Sciter or Cef. It trend ubiquitous, everyones Slack, Flowdock, Viber, Upwork, Github the client and a lot of other software cross connects-platforms do a muzzle on HTML/JS. All looks how many is.