I’ve been working on gotui, a modern fork of the unmaintained termui, rebuilt on top of tcell for TrueColor, mouse support, and proper resize handling. It keeps the simple termui-style API, but adds a bunch of new widgets (charts, gauges, world map, etc.), nicer visuals (collapsed borders, rounded corners), and input components for building real dashboards and tools. Under the hood the renderer’s been reworked for much better performance, and I’d love feedback on what’s missing for you to use it in production.
As a FYI, you removed the original author's name from your license information. Per the MIT license, you need to preserve their copyright in your fork
Think tabs widget would look better if it was more like a text area in appearance. Tab title should be connected to its content.
It is interesting that suddenly the Terminal UI became popular. I am super happy to see this kind of thing pop up.
The Readme for a UI library benefits enormously from screenshots, even terminal based UIs.