So in Python, you can use Qt but I am not sure how their licensing works. You can give Tkinter a try in Python since it's a "default". Also there's Kivy but I don't have experience in that.

As for Javascript, you can use Electron or React Native but I don't know how far along React Native on the desktop is compared to Electron.

Hope that helps and someone may come along that could speak in more depth on one or more of these packages for your use case.