Arduino IDE - Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware...
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
PlatformIO - Next-generation IDE for IoT
Fritzing - Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...
Visual Micro - Arduino IDE for Visual Studio and Atmel Studio
LTspice - LTspice® is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits.