meli VS imtui

There's also https://github.com/meli/meli.

Try https://github.com/meli/meli/ it's mostly stable and doesn't have the problems described in the article. Development's on hold due to some personal factors but it's going to be picked up again.

I don't know if it counts as rich, but I rolled my own terminal UI in my email client meli [0]. There's a web demo here: https://meli.delivery/wasm2.html that is the client compiled to webassembly and the ANSI escape codes translated to equivalent SVG drawing so that you can try it on your browser. [0] https://github.com/meli/meli/

Meli. It's actively developed, looks good, has TUI, supports multiple accts, Maildir, mbox, notmuch, IMAP and JMAP. Need I say more?

My terminal mail client. Work has been slow but steady

https://meli.delivery

https://github.com/meli/meli

Check this out - https://github.com/ggerganov/imtui - it's imgui for tui, and I guess one can compile it as wasm and run there!

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.

This can be as easy as wrapping a simple stdin/stdout loop with rlwrap, all the way to using full featured TUI libraries like bubbletea (golang), textual (python) or imtui (c++).

Second case is trickier. You probably want to check imtui or similar APIs.

imtui

I wouldn't call it standard, but https://github.com/ggerganov/imtui is pretty cool. It puts https://github.com/ocornut/imgui over ncurses.