LVGL – Light and Versatile Embedded Graphics Library (lvgl.io)

InfiniTime (Pine64 Watch Software for the Pinetime) uses LVGL. I've had some fun making a custom watchface with the library in c++.

Recent and related:

LVGL – Light and Versatile Graphics Library - https://news.ycombinator.com/item?id=28779057 - Oct 2021 (15 comments)

I discovered LVGL and used it yesterday for the first time on a board I have developed:

https://forums.raspberrypi.com/viewtopic.php?f=147&t=322135&...

These are stunning quality graphics, for being embedded systems! I remember manually making binary alphabets to show some text on a little 32x128 OLED.