Arduino IDE - Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware...
Vectary - Vectary is a free, online 3D modeling tool and sharing platform.
PlatformIO - Next-generation IDE for IoT
Homies - Growing 3D scene constructor with characters, backgrounds, and objects for outstanding design projects.
Arduino Eclipse plugin - Where Arduino meets Eclipse
Spline - Design tool for 3d web experiences