Checklist Design
Design Principles
Mobbin
Refero Design
5 Years of Design
UX Design Weekly
Laws of UX
Keep Design System
embedXcode
Circuito.io
B4R
InstaPart
PlatformIO
Arduino IDE
library.io
Atmel Studio
Checklist Design
embedXcodeDesign Principles - An open source repository of design principles and methods
Circuito.io - Instant code and wiring for your project
Mobbin - Latest mobile design patterns & elements library
B4R - Development tool for native Arduino programs.
Refero Design - The biggest collection of UX Patterns, UI Elements and design references from great web applications
InstaPart - Build circuit boards faster with parts delivered in <24 hrs