Coding View - Coding View is live collaborative coding environmentdesigned for technical phone interviews. It features web version of Visual Studio Code, as well as access to real terminal. It has a built-in compiler for most popular programming languages.
Edmodo - Where Learning Happens
codebunk - Realtime Collaborative Editor with Code Execution, REPLs and Chat
NEO LMS - LMS for schools, universities, and school districts
Google Classroom - Learning management tool by Google
planetHS - PlanetHS connects school communities online.