PICSimLab is a realtime emulator for PIC, Arduino, STM32, ESP32, ...
(X)BNF simple and clever translation grammar compiler
Use simulation to perform statistical analyses.
An educational software system of a tiny self-compiling C compiler
BASIC language interpreter (multiplatform)
Simple in use library to display dumps and debug Arduino sketches.
An open source gui frontend application for GNU Octave
An open source set of tools to speed up the process of coding