flatui VS NanoGUI

FlatUI

Curses is the de facto TUI base, but there is no de facto standard C++ wrapper around curses. Google has FlatUI, FTXUI and Notcurses are popular, imtui is directly inspired by Dear ImGui. The list goes on and on, there are plenty of popular TUI libraries that all build upon Curses.

NanoGUI

With 2.5 days you probably don't want anything that requires much setup, so Qt is probably a non-starter. You could try this one: https://github.com/wjakob/nanogui, the examples are not the platonic ideal of modern C++ programming, but that also means you don't need much mastery of the language to hammer a program until it has a GUI.

I've dipped my toes into GUI development just enough to know you can have "simple," or you can have "native," but not both. There are smaller projects like nanogui[0] and microgui[1] out there, but of course they're only as small as they are because they don't use native widgets.

[0]https://github.com/wjakob/nanogui/tree/master/src

[1]https://github.com/ryankurte/micro-gui

### [NanoGUI](https://github.com/wjakob/nanogui)

I have only played with this briefly, but after the initial setup NanoGUI seemed pretty intuitive https://github.com/wjakob/nanogui

There's GTK which is all LGPL (ok to dynamic link to) and things like nanogui which is BSD (just attribution).

Wondering if this was inspired by Wenzel Jakob's nanogui [0] by any chance. (cz that's what I wanted to do, rewrite nanogui in C, so I don't have to rely on a C++ compiler).

[0] https://github.com/wjakob/nanogui