There is also Free Vision which is part of Free Pascal. I used it sometime ago when i wanted to write a TUI viewer[0] for info files[1], though i never finished it (should pick it up at some point since it is mostly done).

[0] https://i.imgur.com/Qvkt3W0.png

[1] https://www.gnu.org/software/texinfo/manual/texinfo/html_nod...