
B4R
Circuito.io
embedXcode
InstaPart
library.io
Arduino IDE
Atmel Studio
Zerynth
SourceForge
GitHub
GitLab
BitBucket
openDesktop.org
Gitea
Launchpad.net
OSOR
SourceForgeCircuito.io - Instant code and wiring for your project
GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
embedXcode - embedXcode is a template for Xcode.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
InstaPart - Build circuit boards faster with parts delivered in <24 hrs
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.