Circuito.io - Instant code and wiring for your project
library.io - Learn electronics and easily create circuit boards online
B4R - Development tool for native Arduino programs.
Frame Again - Printed, Framed & Delivered in under 24 hours
embedXcode - embedXcode is a template for Xcode.
Atmel Studio - Atmel Studio is the integrated development platform (IDP) for developing and debugging Atmel.