Libmabuff
libmabuff (or MABuffer) is a simple C++ library for creating “textual graphics”. While it's not as complex, stable nor portable as ncurses, it provides a simple way to create TUIs.
MABuffer is based on termbox (link), hence it has the same strengths and weaknesses (notably the great Unicode support and low portability – it runs only on Linux).
At the time, there's only reference manual on this wiki. You can find everything important for programming with libmabuff there. If you are, however, looking for an example of use, I recommend you seeing the test files in the repo. I'm sure you will find them ;).