replit - Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.
PanQuiz - Create on-line quizzes and assessments
Pastebin.com - Pastebin.com is a website where you can store text for a certain period of time.
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
JSFiddle - Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
QuestBase - QuestBase is a web-based, cross-platform application that provides everything you need to create and manage your assessments, tests, quizzes and exams.