Source
github.com/lvgl/lvgl, Powerful and easy-to-use embedded GUI with many widgets, advanced visual effects (opacity, antialiasing, animations) and low memory requirements (16K RAM, 64K Flash)
github.com/lvgl/lv_arduino, LittlevGL as Arduino Library + example sketch (also ESP32!!)
github.com/lvgl/lv_port_esp32, LittlevGL ported to ESP32 including various display and touchpad drivers
github.com/lvgl/lv_drivers, TFT and touch pad drivers for LittlevGL embedded GUI library
github.com/lvgl/lv_examples/, Examples, tutorials and applications for the LittlevGL embedded GUI library
github.com/lvgl/lv_binding_micropython, LittlevGL bindings to other languages
Documentation
GUI Builder
Architecture design
ongoing GUI builder effort in the community #7
github.com/CURTLab/LVGLBuilder, GUI Builder for littlevgl.
github.com/lvgl/lv_platformio
github.com/littlevgl/lv_sim_visual_studio_sdl
github.com/ScarsFun/pc_simulator