Bluespec Compiler (BSC)
Scala based HDL
PICSimLab is a realtime emulator for PIC, Arduino, STM32, ESP32, ...
Allows you to create machine-readable definitions of asynchronous APIs
Real Time Electronic Circuit Simulator.
Rocket Chip Generator
AVR simulator IDE
Open source process design kit for usage with SkyWater Technology
Run tasks/tests, get trustworthy pass/fail info rolled up
Python Gerber to G-code converter
Electronic design and programming tools suite like Eagle, MpLab
Powerfull pre-processor