...New UI / widget types can be created easily. The core GUIslice library is written in pure C. GUIslice is intended to be used with Raspberry Pi and all Arduino adaptations (ATmega, STM32duino, ESP8266 / NodeMCU, ESP32, Adafruit Feather M0, nRF52, etc.). In addition to RPI, GUIslice works in other LINUX-based platforms including BeagleBone Black and Virtual Machines (VM). The LINUX operation supports framebuffer-based displays without X-windows / X11. Touchscreen controls are supported (both resistive and capacitive), but it is also possible to run on non-touch displays. ...