Tk, and especially Themed Tk (Ttk) mostly fit this. It even has 3 geometry managers. I've ported some code from Tk to run on the web (including working correc

Tk, and especially Themed Tk (Ttk) mostly fit this. It even has 3 geometry managers. I've ported some code from Tk to run on the web (including working correctly in Lynx, as much as possible) [0], and the problem is still impedance mismatch. It's worse when running it on a phone, because you want a fundamentally different UI than you can easily describe. For example, Toplevels (aka windows) don't make any sense on Android or on the Web, but work well on the desktop. [0] https://rkeene.org/projects/tkweb/ https://rkeene.org/projects/tkweb/