library.io - Learn electronics and easily create circuit boards online
Toonify - Cartoonify your selfies
InstaPart - Build circuit boards faster with parts delivered in <24 hrs
Arduino IDE - Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware...
JustSketchMe - Interactive 3d models for drawing reference
Circuito.io - Instant code and wiring for your project