AppCUI is a cross-platform TUI (Text User Interface / Terminal User Interface) / CUI (Console User Interface) framework designed to allow quick creation of both TUI Application and TUI Games. AppCUI is heavily based on C++20 standards and offers a multitude of widgets such as windows, buttons, checkboxes, radioboxes, comboboxes, listviews, treeviews, tab controls, image previewers, and many more.