Logisim - Logisim is an educational tool for designing and simulating digital logic circuits.
Arduino IDE - Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware...
Logicly - - Design circuits quickly and easily with a modern and intuitive user interface with drag-and-drop...
PlatformIO - Next-generation IDE for IoT
Digital - A simulator for digital circuits.
B4R - Development tool for native Arduino programs.