B4R - Development tool for native Arduino programs.
Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
Circuito.io - Instant code and wiring for your project
Eduflow - Digital learning that actually teaches students something
embedXcode - embedXcode is a template for Xcode.
Kialo - Kialo is the platform for rational debate. Empowering reason through friendly and open discussions.